Rate Law Expression Worksheet
This worksheet covers the fundamental concepts of rate law expression, reaction orders, and how to determine them from experimental data for Grade 10 Chemistry students.
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Rate Law Expression Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following statements is true regarding the rate law expression?
It can be determined from the stoichiometry of the balanced chemical equation.
It relates the rate of reaction to the concentrations of reactants.
It is always the same as the reaction mechanism.
It only applies to irreversible reactions.
2. What does the overall reaction order represent?
The sum of the stoichiometric coefficients of reactants.
The sum of the exponents of the reactant concentrations in the rate law.
The number of steps in the reaction mechanism.
The rate constant of the reaction.
3. The is a proportionality constant that relates the rate of reaction to the concentrations of reactants raised to some powers.
4. The exponents in the rate law expression, also known as , must be determined experimentally.
5. Consider the following reaction: A + B → C. If the reaction is first order with respect to A and second order with respect to B, write the rate law expression for this reaction.
6. Explain why the rate law cannot be predicted solely from the stoichiometry of a balanced chemical equation.
7. For an elementary reaction, the reaction orders are equal to the stoichiometric coefficients of the reactants.
True
False
8. A zero-order reaction means that the rate of reaction is independent of the reactant concentration.
True
False
9. For the reaction 2NO(g) + O2(g) → 2NO2(g), the following initial rate data were collected at 25°C:
Experiment | [NO] (M) | [O2] (M) | Initial Rate (M/s) ---|---|---|--- 1 | 0.010 | 0.010 | 2.5 x 10^-5 2 | 0.020 | 0.010 | 1.0 x 10^-4 3 | 0.010 | 0.020 | 5.0 x 10^-5
Determine the rate law expression for this reaction.