A 100 mL sample of a saturated CaSO₄ solution is evaporated to dryness. The water solvent all evaporates and leaves behind a solid residue of CaSO₄ that weighs 0.23 g. The CaSO₄ would be classified as A)insoluble in water. B)slightly soluble in water. C)soluble in water. D)very soluble in water.

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Quizplus · Accepted Answer

The fact that a solid residue of 0.23 g is left after evaporating a 100 mL solution indicates that CaSO4 does dissolve in water, but not in large amounts, which makes it slightly soluble. Solubility classifications are based on the amount of solute that can dissolve in a solvent, and "slightly soluble" substances have limited solubility, but are not considered insoluble.

A 100 ML Sample of a Saturated CaSO4 Solution Is

A 100 ML Sample of a Saturated CaSO₄ Solution Is