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How many grams of potassium sulfate would dissolve in 225 g of water to make a saturated solution?

Potassium sulfate has a solubility of 15 g/100 g water at 40°C. A solution is prepared by adding 46 g of potassium sulfate to 225 g of water, carefully heating the solution, and cooling it to 40°C. A homogeneous solution is obtained.

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