Pellets of calcium chloride are spread on a sidewalk covered in water that is 36°C. Under which circumstance will the calcium chloride dissolve faster?

Crushing the calcium chloride pellets makes them smaller and increases their total surface area in contact with the water. More of the solid can interact with the water at once, so it dissolves faster. Cooling the water would generally slow dissolving, while sprinkling sand or changing air pressure does not increase the pellets’ contact with water.

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