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Question

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Q.5. 32 % methyl alcohol (w/w) [Aqueous solution]. Find mole fraction of methyl alcohol.

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Solution

32 % methyl alcohol means 32 g methanol in 100 g solution.So weight of methanol = 32 gWeight of water = 68 gMoles of methanol n2 = 3232 = 1Moles of water n1= 6818 = 3.78Mole fraction of methanol X2 =n2n1+n2 =13.78 +1 = 14.78 = 0.2092

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