Practice Summary (5) - Chapter 4: Chemical Kinetics

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define the rate of a chemical reaction.
Show hintHide hint
Think about what happens to reactants during the process.
Question 2.
What does the symbol k represent in the rate law?
Show hintHide hint
It's part of the rate law equation.
3Question 3.
What is the unit of the rate constant k for a second-order reaction?
- s^-1
- M^-1 s^-1
- M^2 s^-1
Show hintHide hint
Think about how rates and changes in concentration relate.
4Question 4.
True or False: The order of a reaction is always equal to the coefficients in the balanced equation.
- True
- False
Show hintHide hint
Reflect on the foundation of rate laws.
Question 5.
A reaction follows first-order kinetics. If the half-life is 20 minutes, what will the concentration be after 60 minutes if we start with 1 M? Calculate how many half-lives have passed.
Show hintHide hint
Think about how many times you need to halve the concentration.
Question 6.
For the reaction A → products, the rate constant is measured at 0.5 M^-1 s^-1. If the initial concentration of A is 0.2 M, how long will it take for the concentration to drop to 0.1 M?
Show hintHide hint
Focus on rearranging the integrated rate equation to find time.

4 more questions in this section. Enroll free to practise them all.