Question

After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O

(2) 25.0 g of KNO3 and 100. g of H2O
(3) 25.0 g of NaCl and 100. g of H2O
(4) 25.0 g of NaNO3 and 100. g of H2O

Answer 1

2

Step-by-step explanation:

Because if look at the Solubity curves you will notice other three doesn't go 25 grams. They start above the 25 grams.

Answer 2

The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.