Rate Laws in Chemistry
Explore the fundamentals of chemical reaction rate laws, order of reactions, and factors affecting reaction rates with this comprehensive worksheet for Grade 10 Science.
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Rate Laws in Chemistry
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Read each question carefully and provide your best answer. Show all your work for calculations.
1. Which of the following factors does NOT typically increase the rate of a chemical reaction?
Increasing temperature
Decreasing reactant concentration
Adding a catalyst
Increasing surface area
2. For a reaction A + B → C, if the rate law is Rate = k[A][B]^2, what is the overall order of the reaction?
First order
Second order
Third order
Zero order
3. The is a proportionality constant in the rate law that relates the rate of reaction to the concentrations of reactants.
4. A catalyst works by lowering the energy of a reaction.
5. The order of a reaction with respect to a reactant is determined experimentally, not from the of the balanced chemical equation.
6. Explain the difference between reaction rate and rate law.
7. How does increasing the surface area of a solid reactant affect the rate of a reaction? Provide an example.
8. For an elementary reaction, the stoichiometric coefficients in the balanced equation can be used as the orders of reaction.
True
False
9. A reaction with a higher activation energy will generally proceed faster than a reaction with a lower activation energy, assuming all other conditions are the same.
True
False
10. Consider the decomposition of N2O5 (g) into NO2 (g) and O2 (g). The following data were collected at a constant temperature:
Experiment | [N2O5] (M) | Initial Rate (M/s)
1 | 0.10 | 5.0 x 10^-4
2 | 0.20 | 1.0 x 10^-3
3 | 0.40 | 2.0 x 10^-3
a) Determine the order of the reaction with respect to [N2O5].
b) Write the rate law for this reaction.
c) Calculate the rate constant (k) for this reaction, including units.