Four solutes are added to a solvent. All solutes have the same mass and solubility. The surface areas of four solutes are 2 mm2, 4 mm2, 6 mm2, and 10 mm2. Which solute will dissolve the quickest?

A solute with greater surface area has more of its particles exposed to the solvent at once, so it dissolves faster. Since the solutes have the same mass and solubility, the one with a surface area of 10 mm² will dissolve quickest. That is choice D.

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