CI.3

Question 1

What does the rate of a reaction mean?

Answer 1

The rate at which reactants are converted into products.

Question 2

Why is it useful to know the rate of a reaction?

Answer 2

So you can make changes to concentrations in order to increase rate, or it can tell you about the reaction mechanism.

Question 3

What are five ways you can measure the rate of a reaction?

Answer 3

1. Measuring volumes of gases evolved.
2. Measuring mass changes.
3. pH measurement.
4. Colorimetry.
5. Chemical analysis including titration.

Question 4

What does chemical analysis of a reaction involve that differs from other means of measuring rate?

Answer 4

It involves taking small samples of the mixture at regular intervals and stopping the reaction in the sample before analysis by a process known as quenching.