Reaction Rates Worksheet
A Grade 10 Science worksheet focusing on factors affecting reaction rates, including concentration, temperature, surface area, and catalysts.
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Reaction Rates 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 factors generally increases the rate of a chemical reaction?
Decreasing temperature
Decreasing reactant concentration
Increasing surface area
Adding an inhibitor
2. A catalyst works by:
Increasing the activation energy
Decreasing the activation energy
Changing the enthalpy of the reaction
Increasing the concentration of reactants
3. The minimum amount of energy required for a chemical reaction to occur is called the .
4. Crushing a solid reactant into a powder the reaction rate by increasing its .
5. Increasing the temperature of a reaction will always decrease the reaction rate.
True
False
6. A reaction with a high activation energy will generally proceed faster than a reaction with a low activation energy.
True
False
7. Explain how increasing the concentration of reactants affects the rate of a chemical reaction.
8. Describe the role of a catalyst in a chemical reaction. Provide an example of a catalyst in a real-world application.
Match each term on the left with its definition on the right.
9. Activation Energy
a. Substance that slows down a reaction
10. Catalyst
b. Minimum energy for a reaction to start
11. Inhibitor
c. Substance that speeds up a reaction without being consumed
12. Observe the following energy profile diagram for a chemical reaction.
a) Label the reactants, products, activation energy, and transition state on the diagram above.
b) Is this an exothermic or endothermic reaction? Justify your answer.