OCR GCSE Chemistry A · J248
Specification CM6.1iii · Paper 2 (Foundation), Paper 4 (Higher)
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GCSE Chemistry · key term
The rate of reaction at the beginning of a reaction, found from the gradient of a tangent at time zero.
Used by OCR
Specification CM6.1iii · Paper 2 (Foundation), Paper 4 (Higher)
If asked for the initial rate, draw the tangent at time zero. If a reactant-remaining graph slopes downwards, distinguish the negative gradient from the positive magnitude of the rate at which the reactant is used up.
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