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In lab, 70.34 grams of H2O is saturated with KNO3 at 75.0ºC where the solubility is...

In lab, 70.34 grams of H2O is saturated with KNO3 at 75.0ºC where the solubility is 145 g KNO3/100 g H2O. It is then cooled to 20.0ºC where the solubility is 35g KNO3/100 g H2O. How many grams of KNO3 will precipitate out of the solution?

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