Can someone explain what each of the answer choices will do to the equilibrium? Shiftwise?
Answers
Answer:
[tex]\boxed{\text{(B)}}[/tex]
Explanation:
CaF₂(s) ⇌ Ca²⁺(aq) + F⁻(aq); ΔH > 0
According to Le Châtelier's Principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.
Let's consider each of the stresses in turn.
(A) Evaporating some of the water
The concentrations of the ions will increase, so calcium fluoride will precipitate out to remove the stress (the Ca²⁺ and F⁻ ions). The position of equilibrium does not shift, and [Ca²⁺] stays the same.
(B) Adding HNO₃
HF is a weak acid, so F⁻ is a relatively strong base. The added HNO₃ will convert the F⁻ ions to HF, removing them from solution. More CaF₂ will dissolve to replace the F⁻ ions, and this will add more Ca²⁺ ions as well. The position of equilibrium will shift to the right, and [Ca²⁺] will increase.
(C) Adding NaNO₃(aq)
There is no common ion, so NaNO₃ will have no effect. The added water will dilute the solution and decrease the concentrations of the ions. However, more CaF₂ will dissolve to increase the concentrations. The position of equilibrium does not shift, and [Ca²⁺] stays the same.
(D) Adding NaF
This is the common ion effect. F⁻ is the common ion. The added NaF will dissolve, increasing the concentration of F⁻ ions. More CaF₂ will precipitate to remove the added F⁻ ions, but it removes Ca²⁺ ions at the same time. The position of equilibrium shifts to the left, and [Ca²⁺] decreases.
Related Questions
Iodine, I2, has many uses, including the production of dyes, antiseptics, photographic film, pharmaceuticals, and medicinal soaps. It forms when chlorine, Cl2, reacts with iodide ions in a sodium iodide solution. Which of the following half-reactions for this oxidation‑reduction reaction describes the oxidation, and which one describes the reduction? Cl2 + 2e‒ → 2Cl‒ 2I‒ → I2 + 2e‒
Answers
Answer:
2I ⁻ → I₂ + 2e⁻ describes the oxidation.Cl₂ + 2e⁻ → 2Cl ⁻ describes the reduction.Explanation:
Oxidation-reduction reaction is the simulaneous oxidation and reduction of the substances and is represented by two half-reactions.
The oxidation half-reaction is the loss of electrons, with the consequent increase in the oxidation state by the oxidized substance.
In this case, the process that shows the loss of electrons is:
2I⁻ → I₂ + 2e⁻That reaction shows:
Two I⁻ ions lose two electrons (one each) to be oxidized to I₂.The change in the oxidation number is from -1 to 0.Hence this half-reaction is the oxidation reaction.On the other hand, the reduction half-reaction is the gain of electrons, with the consequent reduction of the oxidation state by the reduced substance.
In this case, the process that shows the gain of electrons is:
Cl₂ + 2e⁻ → 2Cl⁻That reaction shows:
Two Cl atoms gain two electrons (one each) to be reduced to Cl⁻.The change in the oxidation number is from 0 to - 1.Hence, this half-reaction is the reduction reaction.Summary:
2I ⁻ → I₂ + 2e⁻ describes the oxidation.Cl₂ + 2e⁻ → 2Cl ⁻ describes the reduction.
A student wrote a chemical equation as shown.
2H2S + 3O2 → H2O + SO2
What should the student do to balance the equation?
Add a coefficient 4 before H2O and a 2 before SO2.
Add a coefficient 2 before H2O and a 4 before SO2.
Add a coefficient 5 before H2O and a 4 before SO2.
Add a coefficient 2 before H2O and a 2 before SO2.
Answers
Answer:
A. Add a coefficient 4 before h2o and add a 2 before so2
Explanation:
Answer : The correct option is, Add a coefficient 2 before [tex]H_2O[/tex] and a 2 before [tex]SO_2[/tex].
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.
The coefficient tell us about that how many molecules or atoms present in the chemical equation.
The given chemical reaction is,
[tex]2H_2S+3O_2\rightarrow H_2O+SO_2[/tex]
This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen, sulfur and oxygen atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' is put before the [tex]H_2O[/tex] and [tex]SO_2[/tex] and we get the balanced chemical equation.
The balanced chemical reaction will be,
[tex]2H_2S+3O_2\rightarrow 2H_2O+2SO_2[/tex]
We could avoid a large increase in temperature if greenhouse emissions peaked by the year of ?
Answers
To curb the increase in Earth's temperature due to greenhouse gases, we need to reach 'net zero' carbon emissions by 2050 or sooner. The problem arises largely from burning fossil fuels and deforestation, leading to increased CO2 in the atmosphere. Continued trajectory could double Earth's CO2 levels from pre-industrial times by the end of the century.
Explanation:To avoid a large increase in temperature due to greenhouse gas emissions, it is crucial that these emissions peak as soon as possible. According to the Union of Concerned Scientists, we should aim for 'net zero' carbon emissions by 2050 or even sooner. This would mean that no more carbon enters the atmosphere than is removed.
Greenhouse gases, primarily carbon dioxide, are largely a result of burning fossil fuels, such as coal and oil. Alongside this, the destruction of tropical forests which absorb CO2 from the atmosphere exacerbates the problem.
If this trajectory continues, Earth's CO2 levels are predicted to double from pre-industrial levels by the end of this century, leading to potentially catastrophic climactic changes. Hence, mitigation strategies to stabilize carbon emissions constitute a major part of our global strategy towards climate change.
Learn more about Greenhouse Gas Emissions here:https://brainly.com/question/34902503
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Explain what is meant by sp3 hybridization
Answers
Final answer:
The process of sp³ hybridization involves the mixing of an s orbital with three p orbitals to form four sp³ hybrid orbitals. This type of hybridization occurs in molecules like methane. On the other hand, sp² hybridization involves the mixing of an s orbital with two p orbitals to form three sp² hybrid orbitals, which occurs in molecules like boron trifluoride and ethene. Lastly, sp hybridization is the mixing of an s orbital with a single p orbital to form two sp hybrid orbitals, which occurs in molecules like beryllium hydride.
Explanation:
sp³ hybridization is a process where an s orbital and three p orbitals mix to form a set of four sp³ hybrid orbitals. These hybrid orbitals are arranged in a tetrahedral geometry, with each lobe of the hybrid orbitals pointing towards one of the corners of the tetrahedron. This type of hybridization occurs in molecules such as methane (CH₄).
sp² hybridization is the mixing of an s orbital and two p orbitals to form a set of three sp² hybrid orbitals. These hybrid orbitals are arranged in a trigonal planar geometry, with each lobe of the hybrid orbital pointing towards one corner of the triangle. This type of hybridization occurs in molecules such as boron trifluoride (BF₃) and ethene (C₂H₄).
sp hybridization is the mixing of an s orbital with a single p orbital to form a set of two sp hybrid orbitals. These hybrid orbitals are oriented linearly, with each lobe of the hybrid orbital pointing in opposite directions. This type of hybridization occurs in molecules such as beryllium hydride (BeH₂).
In the case of ethene (C₂H₄), each carbon atom undergoes sp² hybridization to form three sp² hybrid orbitals. One of these hybrid orbitals forms a bond with the identical hybrid orbital on the other carbon atom, resulting in the formation of a double bond. The remaining two hybrid orbitals form bonds with the 1s orbitals of two hydrogen atoms. The unhybridized 2pz orbitals on each carbon atom form another bond by overlapping sideways with each other.
The concept of orbital hybridization allows atomic orbitals to combine and form hybrid orbitals that have different energy and orientation compared to the constituent orbitals. In the case of carbon, different combinations of s and p orbitals can produce four sp³, three sp², or two sp hybrid orbitals.
An sp³ hybrid orbital can also hold a lone pair of electrons. For example, in ammonia (NH₃), the nitrogen atom is surrounded by three bonding pairs and a lone pair of electrons. The nitrogen atom undergoes sp³ hybridization, with one hybrid orbital occupied by the lone pair.
Rutherfordium-257 was synthesized by bombarding Cf-249 with C-12. Write a nuclear equation for this reaction.
Answers
Final answer:
The nuclear equation for the synthesis of rutherfordium-257 by bombarding californium-249 with carbon-12 is 24998Cf + 126C → 257104Rf + 410n. It shows the reactants, products, and the conservation of mass and atomic numbers in the reaction.
Explanation:
The student is asking for a nuclear equation for the synthesis of rutherfordium-257, which is created by bombarding californium-249 (Cf-249) with carbon-12 (C-12). The balanced nuclear equation takes into account the conservation of mass and atomic numbers. The californium-249, which has an atomic number of 98 and a mass number of 249, reacts with carbon-12, which has an atomic number of 6 and a mass number of 12.
The equation is:
24998Cf + 126C → 257104Rf + 410n
In this reaction, rutherfordium-257 has an atomic number of 104 and a mass number of 257. To conserve the mass number and atomic numbers on both sides of the equation, we need to add four free neutrons (n) with a mass number of 1 and an atomic number of 0 to the products side. This completes the balanced nuclear equation for the formation of rutherfordium-257.
Calculate ℰ° values for the galvanic cells described below. (a) cr3+(aq) + cl2(g) equilibrium reaction arrow cr2o72-(aq) + cl -(aq) v (b) io3-(aq) + fe2+(aq) equilibrium reaction arrow fe3+(aq) + i2(aq)
Answers
Answer:
[tex]\boxed{\text{(a) 0.00 V; (b) 0.424 V}}[/tex]
Explanation:
We must look up the standard reduction potentials for the half-reactions.
ℰ°
Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O 1.36
Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.35827
2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195
Fe³⁺ + e⁻ ⇌ Fe²⁺ 0.771
(a) Cr³⁺/Cl₂
We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.
ℰ°/V
2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻ -1.36
Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.358 27
2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻ + 6Cl⁻ + 14H⁺ 0.00
(b) Fe²⁺/IO₃⁻
ℰ°/V
Fe²⁺ ⇌ Fe³⁺ + e⁻ -0.771
2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195
10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O 0.424
The ℰ° values for the cells are [tex]\boxed{\textbf{(a) 0.00 V; (b) 0.424 V}}[/tex]
Answer:
Answer:
\boxed{\text{(a) 0.00 V; (b) 0.424 V}}
Explanation:
We must look up the standard reduction potentials for the half-reactions.
ℰ°
Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O 1.36
Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.35827
2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195
Fe³⁺ + e⁻ ⇌ Fe²⁺ 0.771
(a) Cr³⁺/Cl₂
We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.
ℰ°/V
2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻ -1.36
Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.358 27
2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻ + 6Cl⁻ + 14H⁺ 0.00
(b) Fe²⁺/IO₃⁻
ℰ°/V
Fe²⁺ ⇌ Fe³⁺ + e⁻ -0.771
2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195
10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O 0.424
The ℰ° values for the cells are \boxed{\textbf{(a) 0.00 V; (b) 0.424 V}}
Explanation:
its right trust
If 25.21 ml of naoh sloution is required to react completed with .550 g khp, what is the molarity of the naoh solution
Answers
The molarity of the NaOH solution is calculated by determining the moles of KHP, which is 0.002693 mol, and then using the volume of the NaOH solution that reacted with KHP. The molarity comes out to be 0.1068 M.
To determine the molarity of the NaOH solution, we need to know the stoichiometry of the reaction between NaOH and KHP (potassium hydrogen phthalate). The equation for the reaction is:
KHP + NaOH -> KNaP + H2O
Each mole of KHP reacts with one mole of NaOH. First, we determine the moles of KHP:
Molar mass of KHP (C8H5KO4) = 204.22 g/mol
Moles of KHP = mass of KHP / molar mass of KHP
Moles of KHP = 0.550 g / 204.22 g/mol = 0.002693 mol KHP
Since the mole ratio between KHP and NaOH is 1:1, the moles of NaOH will also be 0.002693 mol. We can now determine the molarity (M) of the NaOH solution.
Molarity (M) = moles of solute / liters of solution
Molarity of NaOH = 0.002693 mol / 0.02521 L = 0.1068 M
Therefore, the molarity of the NaOH solution is 0.1068 M.
The molarity of the NaOH solution is [tex]{0.107 \text{ M}[/tex]
To find the molarity of the NaOH solution, follow these steps:
1. Write the balanced chemical equation for the reaction between NaOH and KHP (potassium hydrogen phthalate). The reaction is as follows:
[tex]\[ \text{NaOH} + \text{KHC}_8\text{H}_4\text{O}_4 \rightarrow \text{KNaC}_8\text{H}_4\text{O}_4 + \text{H}_2\text{O} \][/tex]
2. Calculate the moles of KHP that reacted with the NaOH solution. The molar mass of KHP [tex](KHC$_8$H$_4$O$_4$)[/tex] is 204.22 g/mol. Using the given mass of KHP (0.550 g), we can find the moles of KHP:
[tex]\[ \text{moles of KHP} = \frac{\text{mass of KHP}}{\text{molar mass of KHP}} = \frac{0.550 \text{ g}}{204.22 \text{ g/mol}} \][/tex]
3. Perform the calculation for the moles of KHP:
[tex]\[ \text{moles of KHP} = \frac{0.550}{204.22} \approx 0.002693 \text{ mol} \][/tex]
4. Since the reaction between NaOH and KHP occurs in a 1:1 molar ratio, the moles of NaOH that reacted with KHP are equal to the moles of KHP:
[tex]\[ \text{moles of NaOH} = \text{moles of KHP} = 0.002693 \text{ mol} \][/tex]
5. Calculate the molarity of the NaOH solution. The volume of the NaOH solution used is 25.21 ml, which is equivalent to 0.02521 L (since 1 L = 1000 ml):
[tex]\[ \text{Molarity of NaOH} = \frac{\text{moles of NaOH}}{\text{volume of NaOH in liters}} = \frac{0.002693 \text{ mol}}{0.02521 \text{ L}} \][/tex]
6. Perform the calculation for the molarity of NaOH:
[tex]\[ \text{Molarity of NaOH} = \frac{0.002693}{0.02521} \approx 0.1068 \text{ M} \][/tex]
7. To express the molarity with the correct number of significant figures, consider the given data. The volume of NaOH has four significant figures (25.21 ml), and the mass of KHP has three significant figures (0.550 g). Therefore, the molarity should be expressed with three significant figures:
[tex]\[ \text{Molarity of NaOH} = 0.107 \text{ M} \][/tex]
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-2 mol/L. Is this solution acididc, basic, or neutral? Show your work.
Answers
Answer:
[H⁺] = 1.0 x 10⁻¹² M.
Explanation:
∵ [H⁺][OH⁻] = 10⁻¹⁴.
[OH⁻] = 1 x 10⁻² mol/L.
∴ [H⁺] = 10⁻¹⁴/[OH⁻] = (10⁻¹⁴)/(1 x 10⁻² mol/L) = 1.0 x 10⁻¹² M.
∵ pH = - log[H⁺] = - log(1.0 x 10⁻¹² M) = 12.0.
∴ The solution is basic, since pH id higher than 7 and also the [OH⁻] > [H⁺].
A gas has a volume of 50.0 cm3 at a temperature of -73°C. What volume would the gas occupy at a temperature of -123°C if the pressure stays constant?
f 5.0 cm3
g 3.75 cm3
h 37.5 cm3
j 50.0 cm3
Answers
Answer:
h. 37.5 cm³
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and P are constant, and have different values of V and T:
(V₁T₂) = (V₂T₁).
V₁ = 50.0 cm³, T₁ = -73°C + 273 = 200 K,
V₂ = ??? cm³, T₂ = -123°C + 273 = 150 K.
∴ V₂ = (V₁T₂)/(T₁) = (50.0 cm³)(150 K)/(200 K) = 37.5 cm³.
So, the right choice is: h. 37.5 cm³.plants take in carbon dioxide from the air through holes in the
a. xylem
b. spongy layer
c. palisade layer
d. vascular bundle
Answers
Answer:
c. palisade layer
The substance reduced in a hydrogen-oxygen fuel cell is _____. oxygen hydrogen water hydrogen peroxide\
Answers
Answer: Oxygen
Explanation:
Answer: The substance which gets reduced in the hydrogen-oxygen fuel cell is oxygen.
Explanation:
A reduced substance undergoes reduction reaction. This is defined as the reaction in which an atom gains electrons.
A fuel cell is defined as the electrochemical cell which converts the chemical energy of a fuel (often used hydrogen) and an oxidizing agent (often used oxygen) into electrical energy via a pair of redox reactions.
The reactions which occur in hydrogen-oxygen fuel cell are:
At cathode: [tex]H_2+2OH^-\rightarrow 2H_2O+2e^-[/tex]
At anode: [tex]\frac{1}{2}O_2+H_2O+2e^-\rightarrow 2OH^-[/tex]
As, the oxygen is gaining electrons from the above reaction. Thus, it is undergoing reduction reaction and is getting reduced.
Hence, the substance which gets reduced in the hydrogen-oxygen fuel cell is oxygen.
Fernanda looked at a sample of paint under a microscope. At right is the sketch she made of what she saw. Label A points to the solid particles of pigment that give the paint its color. The solid particles are the . Label B represents the liquid surrounding the solid particles. This liquid is called the for this mixture. This paint does not settle over time, so it is an example of a .
Answers
Answer:dispersed state
dispersed medium
colloid
Answer:
Label A points to the solid particles of pigment that give the paint its color. The solid particles are the (dispersed state.)
Label B represents the liquid surrounding the solid particles. This liquid is called the (Dispersed Medium)
This paint does not settle over time, so it is an example of a (Colloid)
Explanation:
Fernanda looked at a sample of paint under a microscope. At right is the sketch she made of what she saw.
To balance a chemical equation it may be necessary to adjust the
Answers
Answer:
To balance a chemical equation it may be necessary to adjust the coefficients.Explanation:
The coefficients of a chemical equation are the numbers that you put in front of each reactant and product. They are used to balance the equation and comply with the law of mass conservation.
By adjusting the coefficients you obtain the relative amounts (moles) of each product and reactant, i.e. the mole ratios.
Here an example.
The first information is what is called a word equation. E.g. nitrogen and hydrogen react to form ammonia:
Word equation: hydrogen + nitrogen → ammoniaSkeleton equation: H₂ + N₂ → NH₃This equation shows the chemical formulae but it is not balanced. The law of mass conservation is not observed.
So, in order to comply with the law of mass conservation you adjust the coefficients as follow.
Balanced chemical equation: 3H₂ + N₂ → 2NH₃As you see, it was necessary to modify the coefficients. Now the law of conservation of mass is observed and you get the mole ratios:
3 mol H₂ : 1 mol N₂ : 2 mol NH₃
Which is the strongest oxidizing agent? lithium; li+ + e– → li e0 = –3.05 v hydrogen; 2h+ + 2e– → h2e0 = 0.00 v fluorine; f2 + 2e– → 2f–e0 = +2.87 v?
Answers
Answer:
Fluorine; f2 + 2e– → 2f–e0 = +2.87 v
Explanation:
Oxidizing agents remove electrons from other atoms to complete a stable outer octet. In this case, Flourine is an oxidizing agent.Hydrogen and lithium are reducing agents because they can lose electrons more easily than accept them. We can also use the electrode potential or e.m.f to determine whether an element is a strong oxidizing agent or not. An element with the largest positive e.m.f is the strongest oxidizing agent as it indicates that its more electronegative.4.32×10^26 atoms of francium would make how many moles of francium sulfide
Answers
Answer:
4.32e+26
Explanation:
Answer:
4.32e+26
Explanation:
Write a nuclear reaction for the neutron-induced fission of u−235 to form xe−144 and sr−90.
Answers
Answer:
235/92U+10n→144/54Xe+90/38Sr+2/10n
Explanation:
The nuclear reaction for the neutron-induced fission of u−235 to form xe−144 and sr−90 is represented by;235/92U+10n→144/54Xe+90/38Sr+2/10n
In nuclear fission reactions a heavy nuclide is split into two light nuclides and is coupled by the release of energy.Which sediment type requires the least amount of energy to be eroded
Answers
Answer:
SEDIMENTARY ROCK
Explanation:
What is the correct answer?
Answers
Answer:
[tex]\boxed{\text{c) Mg}}[/tex]
Explanation:
Think of it this way.
The Mg half-reaction has the most negative potential, so it has the least tendency to go to the right.
For the same reason, it has the greatest tendency to go to the left.
The oxidation half-reaction would be
Mg ⟶ Mg²⁺ + 2e⁻ E° = 2.37 V
[tex]\text{The most readily oxidized species is \boxed{\textbf{Mg}}}[/tex]
After an atomic bomb has been dropped, the damage continues to get worse.
Why is this?
A. Because a fission reaction has no products
B. Because people get sick from exposure to high levels of radiation
C. Because atomic bombs continue going off
D. Because fusion reactions occur afterward
Answers
Answer:
C. Because people get sick from exposure to high levels of radiation
Explanation:
Joe wants to prepare a nitrogen containing compound. Which compound can he prepare?
A. Methane
B. Water
C. Ammonia
D. Hydrochloric acid
Answers
Answer- The correct answer is ammonia.
Explanation- All other compounds that are formed do not have any essence of Nitrogen in it. Whereas, Methane is a compound with carbon and hydrogen as elements while water has hydrogen and oxygen as its elements.
Lastly Hydrogen and chlorine combined together to form hydrochloric acid. Hence the only compound left with nitrogen is ammonia and has nitrogen and hydrogen as its basic elements.
Answer:
The answer is C. Ammonia
Explanation: I got it right on the test.
Have a good day :)
Bohr's atomic model differed from Rutherford's because it explained that electrons exist in specified energy levels surrounding the nucleus. electrons are embedded within the rest of the atom like plum pudding. an atom is an indivisible sphere. electrons circle the nucleus.
Answers
Electrons exist in specified energy levels surrounding the nucleus.
Answer:
electrons exist in specified energy levels surrounding the nucleus.
When light shines on a sample, each element emits specific wavelengths producing a unique fingerprint called its ______ spectra. A) infrared B) line C) raman D) ultraviolet
Answers
Answer:
B.
Explanation:
Answer:
B) line is the correct answer.
Explanation:
When light shines on a sample, each element emits specific wavelengths producing a unique fingerprint called its line spectra.
The line spectrum is electromagnetic spectra consist of discrete spectra lines.
When the atoms are excited they emit ray of specific wavelengths that correspond to various colors. The emitted ray can be seen as a range of colored line, this range of colored lines is termed as line spectra.
lines spectra are usually utilized to recognize atoms and molecules. Each element has individual line emission spectra.
how to identify oxidation half-reaction and reduction half-reaction in a redox equation?
explain
Answers
Answer:
Explanation:
A redox reaction is a reaction in which there is an exchange of electrons between different species. As one specie gains electrons the other loses it and this furnishes the reaction.
Redox reactions are made up of half-reactions which shows how a specie gains electrons and what happens to it. It also shows what happens to a specie that loses electrons.
To understand and be able to identify what an oxidation and reduction half reaction is, we need to know what oxidation and reduction entails.
Oxidation is the loss of electron by an atom. It also entails addition of oxygen to a specie, removal of hydrogen from a specie. This leads to increase in oxidation number of the specie.
Reduction is just the opposite of oxidation and electrons are gained by an atom here.
To identify an oxidation or reduction half in a redox reaction, we look at the species closely and we check for the following:
1. Changes in oxidation number
2. Wether a species loses or gains electrons.
3. Addition /removal of oxygen and hydrogen.
Let's take for example:
Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺
By inspection, we look at the species involved:
Fe: Fe²⁺ → Fe³⁺
The oxidation number increases from 2+ to 3+
There is a loss of an electron for this to occur
We see that this is an oxidation half
Mn: MnO₄⁻ → Mn²⁺
The oxidation number of Mn changes from +7 to +2:
X+ (-2x4) = - 1
X - 8 = - 1
X = 7
This implies that 5 electrons were gained.
There is also a loss of oxygen.
This makes the reaction a reduction half.
This simple way is used to identify reduction and oxidation halves.
To identify oxidation and reduction half-reactions in a redox equation, remember that oxidation involves the loss of electrons and reduction involves the gain of electrons. Balance the reaction by ensuring electrons lost equal electrons gained. Iron and hydrogen serve as examples of a reducing agent and an oxidizing agent, respectively.
To identify oxidation and reduction half-reactions in a redox equation, it's essential to understand the basic principle that oxidation involves the loss of electrons, while reduction involves the gain of electrons.
An oxidation half-reaction will show electrons as products (on the right side), indicating that the species is losing electrons. Conversely, a reduction half-reaction will have electrons as reactants (on the left side), signifying the gain of electrons by the species.
Example of Identifying Half-Reactions
Consider a redox process where Iron (Fe) is oxidized, and Hydrogen (H₂) is reduced. The oxidation half-reaction can be represented as Fe -> Fe²⁺ + 2e⁻, showing iron losing two electrons. For the reduction process, H⁺ + e⁻ -> H₂ illustrates hydrogen gaining electrons.
To ensure the reaction is balanced, the number of electrons lost in the oxidation process must be equal to those gained in the reduction process. This might require multiplying one or both half-reactions by a certain number to balance the electrons.
In the overall reaction, the species that gets oxidized (loses electrons) acts as the reducing agent, and the species that gets reduced (gains electrons) acts as the oxidizing agent. Therefore, in our example, iron acts as the reducing agent, and hydrogen acts as the oxidizing agent.
You are presented with a mixture of iron beads and iron filings. How can you separate them?
Use a magnet
Dissolve the fillings in water
Use a screen
Distillation
NEED HELP ASAP
Answers
Answer:
By using a screen
Answer:
Use a screen
Explanation:
The two priorities for the guest quarters are privacy and cleanliness.
True
False
Answers
trueee hope it helpsss
The given statement is true. Privacy and cleanliness are considered as two priorities for the guest quarters.
Explanation:Quarters are place where people stay as guest for some duration of time. People consider many priorities while booking hotels or quarters for their stay because as they are going to live in it for some span of time.
The first two priorities include privacy and cleanliness. They look out for both the external as well as internal cleanliness. External cleanliness includes surroundings, laws, etc., whereas the inner cleanliness includes right from the articles present in the room till the toilet of the room. As they are living in another individual living area they obviously demand for some sort of privacy.
What type of a reaction occurs when potassium metal reacts with fluorine gas?
Answers
Exothermic Synthesis
Answer:
the answer is Exothermic Synthesis
Determine the oxidation number of Cl in each of the following species.Cl2O7AlCl4-Ba(ClO2)2CIF4+
Answers
These are four questons and four answers:
Answers:
1) 7⁺2) 1⁻3) 3⁺4) 5⁺Explanation:
Question 1) Cl₂O₇:
a) Net charge of the compound: 0
b) Rule: oxygen works with oxidation state +2, except with peroxides.
d) Rule: balance of charges: ∑ of the charges = net charge
Call X the oxidation number of Cl:
2×X + 7 (-2) = 02X - 14 = 02X = +14X = +14 /2 = + 7Conclusion: the oxidation number of Cl in Cl₂O₇ is 7⁺.
Question 2) AlCl₄⁻
a) Net charge of the ion: - 1
b) Rule: common oxidation number of Al in compounds: +3
c) Rule: balance of charges: ∑ charges = net charge = - 1
1 (+3) + 4X = - 1+3 + 4X = - 14X = - 1 - 34X = - 4X = - 1Conclusion: the oxidation number of Cl in AlCl₄⁻ is 1 ⁻.
Question 3) Ba(ClO₂)₂
a) Net charge of the compound: 0
b) Rule: common oxidation number of BA in compounds: +2
c) Rule: common oxidation number of O in compounds (except in peroxides): -2
d) Rule: balance of charges: ∑ charges = net charge = 0
+2 + 2X + 4 (-2) = 02X +2 - 8 = 02X - 6 = 02X = +6X = + 3Conclusion: the oxidation number of Cl in Ba(ClO₂)₂ is 3⁺.
Question 4) CIF₄⁺
a) Net charge of the ion: + 1
b) Rule: common oxidation number of F : - 1 (it is the most electronegative)
c) Rule: balance of charges: ∑ charges = net charge = + 1
X + 4(-1) = +1X - 4 = +1X = +1 + 4X = + 5Conclusion: the oxidation number of Cl in ClF₄⁺ is 5⁺.
when 2.85 moles of chlorine reacts with excess tin, how many moles of tin choloride are formed?
Answers
chlorine by twenty øne piløts
When deciding whom to invite to a party, you should consider which of the following?
ages, interests, and favorites of guests
time of the party
the place the party is to be held
all of the above
Answers
Answer:
all of the above I'm pretty sure
When deciding whom to invite to a party, one should consider the ages, interests, and favorites of guests, the time of the party, and the place the party is to be held, as these factors influence the event's success and shape the relationships among attendees.
Explanation:When deciding whom to invite to a party, it is essential to consider all of the above: the ages, interests, and favorites of guests; the time of the party; and the place the party is to be held. This comprehensive approach ensures that the party is enjoyable for all attendees and suits their preferences and schedules. Not only do these factors play a crucial role in the immediate success of the event, but they can also impact the long-term relationships and social dynamics among those attending.
Considering the ages of guests is important for various reasons. From the practicality of socializing with children of differing ages, as a four-year-old would have different needs and restrictions compared to a four-month-old, to understanding the societal expectations and roles as host or guest in a setting. Furthermore, the interests of guests inform the activities and conversations that will resonate with the crowd. Additionally, by accommodating individuals' favorites, be it food, music, or decorations, you curate a personalized experience that can strengthen relationships.
The time of the party dictates its atmosphere and can affect the availability of your guests. An evening event may suit adults, while a midday gathering might be better for children. Finally, the place where the party is held influences the mood, comfort, and possible activities. Whether in a public venue or a private home, the setting establishes the tone for the interactions and experiences of those present.
Which of the following statements regarding glucose is FALSE?a) Glucose is the main component of starch and glycogen.b) Glucose is also called blood sugar.c) Glucose is the most common disaccharide in our diet.d) Glucose is the most important carbohydrate fuel for the human body.
Answers
Glucose is the most common disaccharide in our diet is the false statement regarding glucose.
What is the chemical formula of glucose?The chemical formula of glucose is written as C₆H₁₂O₆.
Starch and glycogen is the highly branched compound or the polymers, which can be formed from the fundamental monomer unit of glucose. Glucose is also present in the blood of as a blood sugars and used as a source of energy or we can say that fuel for the human body. Glucose is a monosaccharide, it means it will not able to break down in following sub units.
Hence, option (c) is false because glucose is a monosaccharide.
To learn more about glucose, visit the below link:
https://brainly.com/question/461228
The false statement about glucose is (C), that is Glucose is the most common disaccharide in our diet. Glucose is actually a monosaccharide. Common disaccharides include sucrose, lactose, and maltose.
To determine which statement regarding glucose is FALSE, let's analyze the given options:
a) Glucose is the main component of starch and glycogen. This is true, as both starch and glycogen are polysaccharides composed of glucose units.b) Glucose is also called blood sugar. This is true, because glucose circulates in the blood as a primary energy source.c) Glucose is the most common disaccharide in our diet. This statement is false. Glucose is a monosaccharide, not a disaccharide. Common disaccharides include sucrose, lactose, and maltose.d) Glucose is the most important carbohydrate fuel for the human body. This is true, as it is the primary energy source for cellular functions.