Question

Mole fraction of CH₃OH in the mixture containing CH₃OH and C₂H₅OH is 0.5. Find the mass %age of CH₃OH in the mixture.

a) 41%

b) 59%

c) 50%

d) 25%

Answer 1

As the mole fraction of CH3OH is 0.5 then two alcohols are in 1:1 molar ratio.

Molar mass of CH3OH = 32gmol^-1

Molar mass of C2H5OH = 46gmol^-1

Hence the mass % of CH3OH in the mixture

= 32/(32+46)x100=41.025

Comments

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