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Potassium sulfate has a solubility of 15g/100g water at 40 Celsius. A solution is prepared by adding 39.0g of potassium sulfate to 225g water, carefully heating the solution, and cooling it to 40 Celsius. A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated? The beaker is shaken and precipitation occurs. How many grams of potassium sulfate would you except to crystallize out?

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Potassium sulfate has a solubility of 15g/100g water at 40 Celsius. A solution is prepared by adding 39.0g of potassium sulfate to 225g water, carefully heating the solution, and cooling it to 40 Celsius. A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated? The beaker is shaken and precipitation occurs. How many grams of potassium sulfate would you except to crystallize out?

anonymous · Answer

@Luigi0210  @nincompoop  @Abhisar

anonymous · Answer

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joannablackwelder · Answer

How does the amount dissolved into solution compare to the solubility? Is it more, equal, or less?

anonymous · Answer

(15 g) / (100 g H2O) x (225 g H2O) = 33.75 g of solute
Since 39 g is greater the solution is supersaturated.
33.75 g is the amount that will remain in solution, so:
39 g - 33.75 g = 5.0 g will crystallize