Problem: A KNO3 solution containing 51 g of KNO3 per 100.0 g of water is cooled from 40˚C to 0˚C. What will happen during cooling?

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solubility at 40°C  65 g KNO3 in 100 g H2O

solubility at 0°C  15 g KNO3 in 100 g H2O


40°C  0°C 

decrease in solubility

less solute will be soluble in solvent


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Problem Details

A KNO3 solution containing 51 g of KNO3 per 100.0 g of water is cooled from 40˚C to 0˚C. What will happen during cooling?

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Based on our data, we think this problem is relevant for Professor Dhah's class at CSU.