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a) How many grams of KNO_3 should be added to 100 mL of water at 25°C to make a saturated solution?

b) The solubility of KNO_3 increases as temperature increases. When KNO_3 dissolves, is the process endothermic or exothermic?

c) When CaCl_2 dissolves, the process if exothermic. Is CaCl_2 more soluble at high temperature or low temperatures?

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