State one variable, other than the concentration of hydrochloric acid and the temperature, that is expected to influence the rate of this reaction.
Explain why this method does not maintain the reaction mixture at a constant temperature throughout the experiment.
Suggest how the method could be improved so the reaction mixture stays at a constant temperature for the whole experiment.
Which experiment shows an anomalous reaction time?
What can the student do to find out whether the result is anomalous?
How does the rate of the reaction change as the reaction time gets shorter?
Which of the five experiments has the highest reaction rate?
Describe how the reaction rate varies as the acid temperature changes.
Another student carries out the reaction at $80^{\circ}\text{C}$. Why would measuring the reaction time accurately be difficult at this temperature?