AQA A Level Chemistry

Revision Notes

5.2.6 Concentration-Time Graphs

Concentration-Time Graphs

Order of reaction from concentration-time graphs

  • In a zero-order the concentration of the reactant is inversely proportional to time
    • This means that the concentration of the reactant decreases with increasing time
    • The graph is a straight line going down

Reaction Kinetics - Zero Order Concentration, downloadable AS & A Level Chemistry revision notes

Concentration-time graphs of a zero-order reaction

  • In a first-order reaction the concentration of the reactant decreases with time
    • The graph is a curve going downwards and eventually plateaus

Reaction Kinetics - First Order Concentration, downloadable AS & A Level Chemistry revision notes

Concentration-time graphs of a first-order reaction

  • In a second-order reaction the concentration of the reactant decreases more steeply with time
    • The concentration of reactant decreases more with increasing time compared to in a first-order reaction
    • The graph is a steeper curve going downwards

Reaction Kinetics - Second Order Concentration, downloadable AS & A Level Chemistry revision notes

Concentration-time graphs of a second-order reaction

Initial Rates Method

Initial Rates Method

Rate Constant & Zero Order Graphs

Rate Constant & Zero Order Graphs

Close

Join Save My Exams

Download all our Revision Notes as PDFs

Try a Free Sample of our revision notes as a printable PDF.

Join Now
Already a member?
Go to Top