Question

The solubility of a solid in a liquid is significantly affected by temperature changes.
Solute $+$ Solvent $\rightleftharpoons$ Solution.
The system being in a dynamic equilibrium must follow Le-chatelier's principle. Considering the Le-chatelier's principle which of the following is correct?

• A. $\Delta H_{\text {sol }}>0$; solubility $\uparrow$; temperature $\downarrow$
• B. $\Delta H_{\text {sol }} < 0$; solubility $\downarrow$; temperature $\uparrow$
• C. $\Delta H_{\text {sol }}>0$; solubility $\downarrow$; temperature $\uparrow$
• D. $\Delta H_{s o l} < 0$; solubility $\uparrow$; temperature $\uparrow$

Answer 1

Answer: (B)

According to Le-chateliers principle, for an exothermic reaction $(\Delta H < 0)$ increase in temperature, decreases the solubility.