The freezing point of a solution containing 0.2g of acetic acid in 20.0 g of benzene is lowered by 0.45⁰C. calculate the degree of association of acetic acid in benzene. (K_f for benzene =5.12K kg mol-1)

Solution

$Mass of {CH}_{3} COOH = 60 g / mol observed molecular mass = \frac{K_{f} {xW}_{b} x 1000}{∆ T_{f} x W_{A}} = \frac{5.12 x 0.2 x 1000}{20 x 0.45} = 113.8 g {mol}^{- 1} Acetic acid associates as : 2 {CH}_{3} COOH ⇋ ({CH}_{3} COOH)^{1 0}^{1 - α} α / 2 No . of particles after association = 1 - α + \frac{α}{2} = 1 - \frac{α}{2} We know that \frac{No . of particels after association}{No . of partcles before association} = \frac{Normal molecular mass}{Observed molecular mass} or \frac{1 - (α / 2)}{1} = \frac{60}{113.6} solving α = 0.945 therefore degree of association = 94.5 %$

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Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.

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The freezing point of a solution containing 0.2g of acetic acid in 20.0 g of benzene is lowered by 0.45⁰C. calculate the degree of association of acetic acid in benzene. (K_f for benzene =5.12K kg mol-1)

Some More Questions From Solutions Chapter

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

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The freezing point of a solution containing 0.2g of acetic acid in 20.0 g of benzene is lowered by 0.450C. calculate the degree of association of acetic acid in benzene. (Kf for benzene =5.12K kg mol-1)

Some More Questions From Solutions Chapter

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 370C.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

The freezing point of a solution containing 0.2g of acetic acid in 20.0 g of benzene is lowered by 0.45⁰C. calculate the degree of association of acetic acid in benzene. (K_f for benzene =5.12K kg mol-1)

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.