Why does powdered calcium carbonate react faster with hydrochloric acid than calcium carbonate chips?

Exposed surface area

Explanation:

The powdered calcium carbonate will react faster with hydrochloric acid than calcium carbonate chips due to the exposed surface area.

Powdered calcium carbonate has a larger surface area compared to the chips. And, the larger the surface area exposed on a body, the faster the reaction it will undergo.

For the same masses of a solid substance, the smaller the particle size of each form, the larger the surface area exposed to reaction.

The surface area exposed proportionally affects the rate of reaction.

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