ChemistrySolubilityJAMB
The solubility of KNO₃ is 60 g per 100 g of water at 40 °C and 30 g per 100 g at 20 °C. What mass of crystals forms when 160 g of saturated solution at 40 °C is cooled to 20 °C?
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Answer: C. 30 g
160 g contains 100 g water and 60 g salt; only 30 g stays dissolved at 20 °C.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.