Describe collecting gas or measuring mass loss as practical methods for investigating reaction rate. (AT 1, AT 3, AT 5, AT 6)

In Factors which affect rates of chemical reactions, this learning objective focuses on how to describe collecting gas or measuring mass loss as practical methods for investigating reaction rate. (AT 1, AT 3, AT 5, AT 6). Within Rate of reaction, students should keep the idea anchored to Factors which affect rates of chemical reactions rather than drifting into a different rate, equilibrium, catalyst, reversible reaction, or graph concept. Key terms to use include rate, AT 1, AT 3, AT 5. A strong AQA GCSE Chemistry answer names the exact factor or relationship, explains the particle or equilibrium reason where needed, and links the point back to the question wording with correct units or graph language when relevant.