Worksheet: Second-Order Rate Plots

In this worksheet, we will practice plotting concentration–time data for second-order reactions to calculate the rate constants and initial concentrations.

Q1:

The concentration of a reactant A was monitored during the course of a reaction. The data were plotted on a graph of 1 [ A ] against time. If the reaction is second-order with respect to A, what is the initial concentration of A in terms of the gradient of the plot π‘š and the 𝑦 -intercept 𝑐 ?

  • A βˆ’ π‘š
  • B 𝑐
  • C βˆ’ 1 𝑐
  • D 1 𝑐
  • E βˆ’ 1 π‘š

Q2:

The concentration of a reactant A was monitored during the course of a reaction. The data were plotted on a graph of 1/[A] against time. If the reaction is second-order with respect to A, what is the rate constant of the reaction in terms of the gradient of the plot π‘š and the 𝑦 -intercept 𝑐 ?

  • A 𝑐
  • B βˆ’ 1 π‘š
  • C 1 𝑐
  • D βˆ’ π‘š
  • E π‘š 𝑐

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