Derive the relationship between relative lowering of vapour pressure and molar mass of solute.
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The solution that have the partial vapour pressure with volatile compound in solution will have the proportionality rule with the mole fraction,
Pa is proportional to Xa
Pa * Xa
Pa = P0a * xa
However, L = Xa + Xb
Xa = 1 – Xb
Pa = P0a (1 – Xb)
Poa – Poa Xb
Total vapour = P = Pa + Pb = Poa + Pob * b
Xb = Poa – Pa/Poa
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