Essential Chemistry for IGCSE - Rate Of Reaction (Section 3 - No. 43)

Which of the following methods can be used to measure the rate of reaction of a gas evolving reaction?

Measuring the loss in mass

Measuring the volume of gas produced

Measuring the change in color of the solution

Measuring the change in pH of the solution

The loss in mass is measured as the gas escapes, and measuring the volume directly observes the gas produced.