9.3—The rate of a reaction from: i the time taken for a reaction

Be able to calculate the rate of a reaction from: i the time taken for a reaction, using rate = 1/time ii the gradient of suitable graph, by drawing a tangent, either for initial rate, or at a time, t.

Use —the rate of a reaction from: i the time taken for a reaction to connect the rule to the data and decision in the question.

This matters because —the rate of a reaction from: i the time taken for a reaction determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the rate of a reaction from: i the time taken for a reaction to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The rate of a reaction from: i the time taken for a reaction is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.