Initial rates method
What Initial rates method means in Chemistry A-Level, as defined for OCR.
Definition of Initial rates method
Check what you remember
Read the wording for your board, then hide it and explain Initial rates method in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Carrying out separate experiments with one reactant's concentration varied while others are held constant, measuring the rate at the very start of each reaction.
Topics that use Initial rates method
- How fast? (OCR A-Level)
Related terms
- Calculating rate and concentration from the rate equation
- Colorimetry
- Concentration–time graphs
- Constant half-life
- continuous monitoring
- Controlled comparison of experiments
- Deducing order from initial-rate data
- Deducing order with respect to a reactant
Using Initial rates method in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge