Which sulfate is typically insoluble in water according to the listed exceptions?

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Multiple Choice

Which sulfate is typically insoluble in water according to the listed exceptions?

Explanation:
Sulfates are mostly soluble in water, but there are a few exceptions where the solid doesn’t dissolve well because the lattice energy of the salt is high or the hydrate formation isn’t strong enough to overcome it at room temperature. Among common classroom examples, calcium sulfate is sparingly soluble in water, forming only a small amount of Ca2+ and SO4^2− ions. The other sulfates listed—sodium sulfate, magnesium sulfate, and ammonium sulfate—dissolve readily to give clear aqueous solutions. So, the sulfate that is typically insoluble in water in these lists is calcium sulfate.

Sulfates are mostly soluble in water, but there are a few exceptions where the solid doesn’t dissolve well because the lattice energy of the salt is high or the hydrate formation isn’t strong enough to overcome it at room temperature. Among common classroom examples, calcium sulfate is sparingly soluble in water, forming only a small amount of Ca2+ and SO4^2− ions. The other sulfates listed—sodium sulfate, magnesium sulfate, and ammonium sulfate—dissolve readily to give clear aqueous solutions. So, the sulfate that is typically insoluble in water in these lists is calcium sulfate.

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