Explain what is meant by the term rate of reaction.
Mark the graph to indicate the fraction of 2-bromo-2-methylpropane molecules that have enough energy to react.
On the same axes, sketch the energy distribution for a sample of 2-bromo-2-methylpropane at $50\,^{\circ}\text{C}$.
State the effect of an increase in temperature on $E_a$ for this reaction.
Draw the mechanism for the reaction of 2-bromo-2-methylpropane with $\text{OH}^- (aq)$. Show the intermediate produced in this reaction. Include all charges, partial charges, lone pairs and curly arrows where relevant.
Name the mechanism for this reaction.
The experiment is carried out again at $25\,^{\circ}\text{C}$, but with 2-chloro-2-methylpropane used instead of 2-bromo-2-methylpropane. Keep all other variables unchanged. Predict how the time for the pink colour to disappear compares with the original experiment. Explain your answer.