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MHT CET20249 May 2024Morning ShiftChemistrySolutionsActual

Calculate the cryoscopic constant of solvent when 2.5 gram solute is dissolved in 35 gram solvent lowers its freezing point by 3 K . (molar mass of solute is 117 ~g ~mol ⁻¹ )

Options

  1. A3.11 ~K ~kg ~mol ⁻¹
  2. B3.56 ~K ~kg ~mol ⁻¹
  3. C5.52 ~K ~kg ~mol ⁻¹
  4. D4.91 ~K ~kg ~mol ⁻¹

Correct answer

D. 4.91 ~K ~kg ~mol ⁻¹

Step-by-step solution

aligned & T _ f = 1000 ~K _ f ~W ₂ M ₂ ~W ₁ & ~K _ f = T _ f M ₂ W _ i 1000 W ₂ & = 3 ~K 117 ~g ~mol ⁻¹ 35 ~g 1000 gkg ⁻¹ 2.5 ~g & =4.91 ~K ~kg ~mol ⁻¹ aligned

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