$$\[ \mathrm{HCl}(a q)+\mathrm{CaCO}_{3}(s) \rightarrow \mathrm{CaCl}_{2}(a q)+\mathrm{CO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l) \]$$ The reaction between $$\(\mathrm{HCl}(\mathrm{aq})\)$$ and $$\(\mathrm{CaCO}_{3}(s)\)$$ is represented by the equation above. Two separate trials were carried out using $$\(\mathrm{CaCO}_{3}(s)\)$$ samples of the same mass, but one sample was a single piece of $$\(\mathrm{CaCO}_{3}(s)\)$$, and one sample was composed of small pieces of $$\(\mathrm{CaCO}_{3}(s)\)$$. The loss of mass of $$\(\mathrm{CaCO}_{3}(s)\)$$ as a function of time for both trials is shown in the graph below. 6. Which of the curves, $$\(\mathrm{X}\)$$ or $$\(\mathrm{Y}\)$$, represents the reaction with small pieces of $$\(\mathrm{CaCO}_{3}(s)\)$$, and why?

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