Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH 2 O. The molecular mass of A is ____ g. (Nearest integer)

Question

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The osmotic pressure ($ \pi $) for a solution is given by the formula: $$ \pi = \frac{nRT}{V} $$ where: $ n $ is the number of moles of solute, $ R $ is the gas constant, $ T $ is the temperature, $ V $ is the volume of the solution. For non-electrolyte (A) and glucose, the osmotic pressures are the same, so we can equate the osmotic pressures: $$ \frac{12 / M_A}{1} = 0.05 \times 1 $$ where $ M_A $ is the molar mass of A, and 12 g is the mass of A. Simplifying the equation: $$ \frac{12}{M_A} = 0.05 \quad \Rightarrow \quad M_A = \frac{12}{0.05} = 240 \, \text{g/mol}. $$ Thus, the molecular mass of A is 240 g/mol.

Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH₂O. The molecular mass of A is ____ g. (Nearest integer)

Correct Answer: 240

Solution and Explanation

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Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH2O. The molecular mass of A is ____ g. (Nearest integer)

Correct Answer: 240

Solution and Explanation

Top Questions on molecular mass of polymers

Questions Asked in JEE Main exam

Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH₂O. The molecular mass of A is ____ g. (Nearest integer)