Chemical Kinetics and Equilibrium Quiz
Test your understanding of chemical kinetics and equilibrium. Please answer all questions carefully.
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Instructions: Read each question carefully and select or write the best answer.
1. Which factor does NOT affect the rate of a chemical reaction?
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Concentration of reactants
Temperature
Presence of a catalyst
Color of the reactants
2. At equilibrium, which of the following is true for a reversible reaction?
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The concentrations of reactants and products are equal.
The forward and reverse reaction rates are equal.
All reactions stop.
The products are favored.
3. Which statement best describes a catalyst?
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It increases the activation energy.
It is consumed in the reaction.
It speeds up the reaction without being consumed.
It changes the equilibrium position.
4. Match the following terms with their correct definitions.
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Rows
Definition
The minimum energy required for a reaction to occur
Rate of reaction
Activation energy
Dynamic equilibrium
Catalyst
A state where the forward and reverse reactions occur at the same rate
Rate of reaction
Activation energy
Dynamic equilibrium
Catalyst
A substance that increases reaction rate without being consumed
Rate of reaction
Activation energy
Dynamic equilibrium
Catalyst
The speed at which reactants are converted to products
Rate of reaction
Activation energy
Dynamic equilibrium
Catalyst
5. Which of the following will shift the equilibrium to the right for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)?
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Increasing pressure
Decreasing temperature (exothermic reaction)
Removing NH3 as it forms
All of the above
6. Select all factors that can increase the rate of a chemical reaction.
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Increase temperature
Add a catalyst
Decrease concentration of reactants
Increase surface area of reactants
Other
7. True or False: At equilibrium, the concentrations of products and reactants remain constant over time.
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True
False
8. Briefly explain what is meant by 'dynamic equilibrium.'
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9. Calculate the equilibrium constant (Kc) for a reaction where [A]=0.2 M, [B]=0.4 M, and [C]=0.1 M for the reaction: A + 2B ⇌ C.
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10. A student adds more reactant to a system at equilibrium. Predict and explain what happens to the position of equilibrium.
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