Magnesium carbonate and hydrochloric acid combine to produce a gas. The gas volume is recorded at regular time intervals. In experiment 1, excess magnesium carbonate granules react with $100\,\text{cm}^3$ of hydrochloric acid. The experiment is then carried out again, but with one alteration. This is experiment 2. The findings are displayed on the graph. What change has been made?
- AA catalyst is added.
- BMagnesium carbonate powder is used.
- CThe hydrochloric acid is more concentrated.
- DThe temperature is lower.