# At a certain temperature the vapor pressure of pure methanol CH3OH is measured to be 205.torr. Suppose a solution is prepared by mixing 133.g of methanol and 135.g of acetone CH32CO. Calculate the partial pressure of methanol vapor above this solution. Round your answer to 3 significant digits.Note for advanced students: you may assume the solution is ideal.

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At a certain temperature the vapor pressure of pure methanol CH3OH

is measured to be 205.torr. Suppose a solution is prepared by mixing 133.g of methanol and 135.g of acetone CH32CO. Calculate the partial pressure of methanol vapor above this solution. Round your answer to

3 significant digits.

Note for advanced students: you may assume the solution is ideal.

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Step 1

Partial pressure is determined by using equation (1)

methanol = partial pressure of methanol

Xmethanol = mole fraction of methanol

P˚methanol = vapor pressure of pure methanol.

Also given that vapor pressure of pure methanol is 205 torr.

Step 2

Given mass of methanol =133 g

The molecular mass of methanol = 32.04 g mol-1

Number of moles of methanol (n1)

Given mass of acetone =135 g

The mole...

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