Question

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Qno:- 50

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Answer 1

HERE IS YOUR ANSWER. .

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.1 answer · Chemistry

Best Answer

Vapor pressure of a solvent is greater than the vapor pressure of a solution.

Vapor pressure is related to the mole fraction of solvent.

The more solute particles, the lower the vapor pressure.

Organic compounds like a and b tend to be nonionizing meaning the solute concentration is

a: 0.2M and b: 0.1M.

Since MgSO4 ionizes to Mg2+ and SO4^2- the particle concentration is 2 x 0.1M = 0.2M.

Finally, BaCl2 ionizes to Ba2+ + 2Cl- so the particle concentration is 3 x 0.1M = 0.3M.

Thus D has the lowest mole fraction of solvent, and the lowest vapor pressure.

Answer 2

As the number of ions of non-volatile solute increases in the solution, the lowering in vapour pressure increases.

So, answer is BaCl.