The solubility of potassium nitrate is 13 g per 100. ml of water at 0 oc and 246 g per 100. ml of water at 100.oc. a quantity of 246 g of potassium nitrate is dissolved in 100. ml of water at 100. oc and the solution is cooled to 0 oc. what percentage by mass of the kno3 crystallizes at 0oc?

94.7%

Explanation:

The solubility is the maximum amount of solute that can be dissolved in 100 mL (or 100g ) of solvent. Let's consider we have 100 mL of water

At 100 °C, 246 g of solute are dissolved. However, when the solution is cooled to 0 °C, only 13 g of KNO₃ remain dissolved. The mass that crystallizes is:

246 g - 13 g = 233 g

The percentage by mass of the KNO₃ that crystallizes is:

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explanation: