In which of the following salts, the solubility increases appreciably with increase in temperature?

In which of the following salts, the solubility increases appreciably with increase in temperature?
  1. KBr
  2. NaBr
  3. NaCl
  4. KCl

Solution

The solubility of solid solute depends upon temperature. Variation of solubilities of some ionic solids with temperature - Generally, rise in temperature increase the solubility. This is due to expansion of holes or empty spaces in the liquid solvent. Generally, $10^{\circ} \mathrm{C}$ rise in temperature, increase the solubility of solids two-fold. - Dissolution process may be endothermic or exothermic. - The solubility of the substances like $\mathrm{NaBr}, \mathrm{NaCl}, \mathrm{KCl}$, etc. changes slightly with the increase in temperature. - The solubility of the salts like $\mathrm{NaNO}_3, \mathrm{KNO}_3, \mathrm{KBr}$, etc. increases appreciable with the increase in temperature. - The solubility of $\mathrm{Na}_2 \mathrm{SO}_4$ first increase and after $30^{\circ} \mathrm{C}$ decreases with the increase in temperature.

Asked in: MHT CET 2021 (21 Sep Shift 2)

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