Chemistry · Oct / Nov 2016 · Paper 12 · Question 17

In two experiments, 1 and 2, an excess of powdered calcium carbonate was reacted in a flask with dilute hydrochloric acid. In experiment 1, the carbon dioxide evolved was collected and the volume of gas measured at regular intervals. In experiment 2, the mass of the flask and its contents was measured at regular intervals. The results of both experiments were plotted on graphs. Which graphs correctly show the results of these two experiments?

1. Aexperiment 1: W; experiment 2: Y
2. Bexperiment 1: W; experiment 2: Z
3. Cexperiment 1: X; experiment 2: Y
4. Dexperiment 1: X; experiment 2: Z

As printed in the paper