16 Questions
Which factor does not affect the rate of a chemical reaction?
Volume of the reaction vessel
What is the main function of a catalyst in a chemical reaction?
Lowering the activation energy
In a chemical reaction, what happens to the concentration of reactants as the reaction proceeds?
Decreases
Which of the following statements correctly describes the rate of a chemical reaction?
The rate of a chemical reaction can be affected by the presence of a catalyst.
What is the primary purpose of determining the rate law for a chemical reaction?
To determine how the concentration of reactants affects the rate of the reaction.
What effect does an increase in temperature generally have on the rate of a chemical reaction?
The rate of the reaction increases as temperature provides more kinetic energy to reactant molecules.
What is the relationship between the rate constant and the half-life of a first-order reaction?
They are inversely proportional
What does the half-life of a first-order reaction describe?
Time required for the reactant concentration to decrease by half
What is the unit of the rate constant for a first-order reaction?
M/1-s^(-1)
Which factor does not affect the half-life of a first-order reaction?
Initial concentration of the reactant
If two first-order reactions have different rate constants, which one will have a shorter half-life?
The reaction with the higher rate constant
What is the relationship between the rate constant and the half-life of a first-order reaction?
As the rate constant increases, the half-life decreases
How does the half-life of a first-order reaction change with a decrease in the rate constant?
The half-life increases
Why is the half-life formula applicable to any first-order reaction?
Because the formula is independent of the rate constant
What can the half-life of a first-order reaction help predict?
The time taken for a reactant to reach a certain percentage of its initial value
In what way is the half-life related to the initial concentration of the reactant in a first-order reaction?
The initial concentration has no effect on the half-life
Test your knowledge of chemical kinetics with this quiz on factors affecting the rate of a chemical reaction and the function of catalysts. Learn about the concentration of reactants as a chemical reaction progresses.
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