Practice Reaction Rate in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The speed at which reactants are converted into products in a chemical reaction, quantified as the change in concentration of a reactant or product per unit time.

How quickly the reaction happens—from instant explosion to years of rusting.

Example 1

easy
List four factors that affect the rate of a chemical reaction and explain how each works.

Example 2

medium
In a reaction, the concentration of a reactant decreases from 0.80\,\text{M} to 0.20\,\text{M} over 120 seconds. Calculate the average rate of reaction.

Example 3

easy
Why does increasing temperature speed up a chemical reaction?

Example 4

medium
Two equal masses of calcium carbonate react with the same acid. One sample is powder and the other is large chips. Which reacts faster, and why?
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