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MHT CET202410 May 2024Evening ShiftChemistrySolutionsActual

Which from following ionic solids exhibits decrease in its solubility in water with increase of temperature?

Options

  1. ANaCl
  2. BKNO ₃
  3. CNaNO ₃
  4. DNa ₂ SO ₄

Correct answer

D. Na ₂ SO ₄

Step-by-step solution

Among the given options, sodium sulfate ( Na ₂ SO ₄ ) exhibits a decrease in solubility with an increase in temperature. This behavior is unusual because, for most ionic solids, solubility tends to increase with temperature. However, for Na ₂ SO ₄ , its dissolution is exothermic, meaning it releases heat when it dissolves in water. According to Le Chatelier's principle, if the dissolution process is exothermic, increasing the temperature will shift the equilibrium to favor the undissolved solid, thereby reducing so

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