# Worksheet: First-Order Rate Plots

Q1:

The concentration of a reactant A was monitored during the course of a reaction. The data were plotted on a graph of against time. If the reaction is first-order with respect to A, what is the initial concentration of A in terms of the gradient of the plot and the -intercept ?

• A
• B
• C
• D
• E

Q2:

The concentration of a reactant A was monitored during the course of a reaction. The data were plotted on a graph of against time. If the reaction is first-order with respect to A, what is the rate constant of the reaction in terms of the gradient of the plot and the -intercept ?

• A
• B
• C
• D
• E

Q3:

During a reaction, the concentration of a reactant is measured as a function of the reaction time, . All other reactants are in large excess. Which graph could be plotted to check whether the reaction is of the first order with respect to ?

• A against
• B against
• C against
• D against
• E against

Q4:

Compounds A and B react according to the equation: The reaction is first-order with respect to A, and B is in large excess. Which function of the reaction rate varies linearly with the reaction time?

• A
• B
• C
• D
• E