Question

Calculate the mole fraction of rectified spirit (95% ethyalcohol by mass )

Answer 1

Hi Dude

95 % means 100 g water has 95 g ethylalcohol now calculate the moles

and then mole fraction .

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Answer 2

Since no solvent is specified we will consider in to the an aqueous solution

95% of ethanol by amt solution consists of 95 g of ethanol is 5 g of water

95g of ethanol 9545 mole

molecular wt of ethanol = 45g

5g of water = 518 mole

Xethanol = methanol/methanol+nwater

=95/45 ÷ 95/45 + 518

Xethanol = 2.111/2.111 + 0.278

= 0.881