1. **Problem statement:** We need to find how many grams of KNO3 can dissolve in 100 ml of water at 65°C and the solubility of KBr at 70°C based on the given solubility graph. 2. **Understanding solubility:** Solubility is given in grams of solute per 100 grams of water. Since the density of water is approximately 1 g/ml, 100 ml of water weighs about 100 g. Thus, solubility values can be directly interpreted as grams of solute per 100 ml of water. 3. **Finding solubility of KNO3 at 65°C:** From the graph, the solubility of KNO3 at 65°C is approximately 110 g per 100 g of water. Therefore, grams of KNO3 that can dissolve in 100 ml of water at 65°C is about $110$ g. 4. **Finding solubility of KBr at 70°C:** From the graph, the solubility of KBr at 70°C is approximately 55 g per 100 g of water. Hence, the solubility of KBr at 70°C is about $55$ g per 100 g of water. **Final answers:** - KNO3 dissolves about $110$ g in 100 ml of water at 65°C. - Solubility of KBr at 70°C is about $55$ g per 100 g of water.