4.7 - Half-Life of a Reaction
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Practice Questions
Test your understanding with targeted questions
Define half-life in your own words.
💡 Hint: Think about what happens to reactant amounts over time.
What is the equation for calculating half-life in first-order reactions?
💡 Hint: Recall the formula given earlier.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the definition of half-life in chemical reactions?
💡 Hint: Think about the meaning of 'half-life' as two parts.
For first-order reactions, is half-life dependent on the initial concentration?
💡 Hint: Recall our discussion about constant half-life.
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Challenge Problems
Push your limits with advanced challenges
A hypothetical drug has a half-life of 3 hours. If a patient takes 50 mg at 8 AM, how much of the drug remains in their system at 2 PM?
💡 Hint: Remember to count the number of half-lives.
For a certain reaction with a half-life of 5 days, if you start with 80 grams of a reactant, how much remains after 15 days?
💡 Hint: Calculate how many half-lives fit into 15 days.
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