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The solubility curve of KNO3 in water is shown below.The amount of KNO3 that dissolves in 50 g of water at 40°C is closest to(a) 100 g(b) 150 g(c) 200 g(d) 50 g

Answer»

Answer is : (a) 100 g

From the graph it can be seen that solubility of KNO3 in water at 40°C is approximately 200 g per 100 of water.

∴ Amount of KNO3 that dissolve (or solubility) in 50 g of water will = 200/100 x 50 = 100 g



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