Question

2 mole of ethanol is dissolved in 8 mole
of water. The mole fraction of
water in solution is​

Answer 1

Your answer:

Mole fraction of water  =  $\frac{No\:\:of\:\:moles\:\:of\:\:water}{No.\:\:of\:\:moles\:\:of\:\:water+No\:\:of\:\:moles\:\:of\:\:ethanol}$ = 8/8+2 = 8/10 = 0.8

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Answer 2

Answer :

Moles of ethanol = 2

Moles of water = 8

We have to find mole fraction of water in solution$.$

Mole fraction :

★ Definition : Mole fraction is defined as the ratio of number of moles of one component to the total number of moles of all the components.

★ Symbol : x

★ Effect of temperature : No effect

➙ x₂ = n₂/(n₁ + n₂)

➙ x₂ = 8/(2+8)

➙ x₂ = 8/10

➙ x₂ = 0.8

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