Calculate the mass of non-volatile solute having molar mass of 40g/mol,which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

Question

Saurabh Koranglekar · Answer

Vikas TU · Answer

Dear student

Let p be the vapour pressure of pure octane. The vapour pressure of solution will be
p=0.8 p.
Molar mass of solute (M) and octane (m) are 40 g/mol and 114 g/mol respectively. Mass of octane, w is 114 g.
p-p'/p = Wm/Mw
W = 8g
Hence, 8 g of solute are required.

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Calculate the mass of non-volatile solute having molar mass of 40g/mol,which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

Calculate the mass of non-volatile solute having molar mass of 40g/mol,which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

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Calculate the mass of non-volatile solute having molar mass of 40g/mol,which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

Calculate the mass of non-volatile solute having molar mass of 40g/mol,which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

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