Dilute hydrochloric acid is allowed to react with excess calcium carbonate, and the total volume of gas is recorded at regular intervals. The findings are represented by line W on the graph. A second trial is then carried out with one condition changed. The outcomes of this second trial are shown by line X on the graph. Which change is made in the second experiment?
- AA catalyst is added.
- BThe calcium carbonate is broken into smaller pieces.
- CThe concentration of the dilute hydrochloric acid is increased.
- DThe temperature of the dilute hydrochloric acid is decreased.