A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be dissolved into 100 mL of water. What property of the unknown substance was the chemist most likely investigating?

The chemist measured how much of the substance dissolves in a given amount of water: 33 g per 100 mL at room temperature. That describes its solubility, the amount of a substance that can dissolve in a specified amount of solvent under stated conditions. The rate of dissolution would describe how quickly it dissolves, which was not measured.

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