Question

The following substances were all dissolved in 100 grams of water at 290 K to produce saturated solutions.If the solution is heated to 310 K, which substance will have a decrease in its solubility:

• A. $NaCI$
• B. $KI$
• C. $CaC{l}_2$
• D. $HCI$
• E. $KN{O}_3$

Answer 1

Answer: (D)

$HCI$

The following substances were all dissolved in 100 grams of water at 290 K to produce saturated solutions. If the solution is heated to 310 K, HCl will have a decrease in its solubility. HCl is a gas. The solubility of a gas in a solution is inversely proportional to the absolute temperature. With increase in the temperature, the solubility of a gas decreases.