Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2$^\circ$C. The percentage association of solute A in water, is : [Given : Molar mass of A = 93 g mol$-$1. Molal depression constant of water is 1.86 K kg mol$-$1.]

Question

Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2$^\circ$C. The percentage association of solute A in water, is :

[Given : Molar mass of A = 93 g mol^$-$1. Molal depression constant of water is 1.86 K kg mol^$-$1.]

50%

60%

70%

80%

Solution

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