Question
Asked Sep 8, 2019

Determine the mole fraction of p-dichlorobenzene dissolved in 1.00L of cyclohexane that shifts the vapor pressure from 78mmHg to 70 mmHg. Can you determine the mass of solute dissolved?

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Step 1

Here, we have to determine mole fraction and mass of p-dichlorobenzene (solute) dissolved in 1.00L of cyclohexane (solvent).

Step 2

Relative lowering of vapour pressure is equal to mole fraction of the solute.

Ap
Xsolute
po
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Ap Xsolute po

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Step 3

Given:

    Vapour pressure of a solvent Po = 78mmHg.

    Vapour pressure...

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