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a. NaNO3 is soluble in water, so it will dissolve completely in 100 g of water at 30°C.
b. KCIO3 is soluble in water, so it will dissolve completely in 50 g of water at 50°C.
c. KNO3 is soluble in water, so it will dissolve completely in 100 g of water at 60°C.
d. KCl is soluble in water, so it will dissolve completely in 200 g of water at 80°C.
e. The solubility of KNO3 in water at 50°C is 38.8 g/100 g of water. Therefore, to prepare a saturated solution in 100 g of water at 50°C, you would need 38.8 g of KNO3.