Question

Ethanol water mixture has 46% ethanol (weight/ solution weight). Hence, mole fraction of H2O is….​

Answer 1

Answer:

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Explanation:

Mole fraction is a way of expressing concentration of a mixture or a solution. It makes use of the mole values of the components making up the mixture.

The mole fraction of a component of a mixture is calculated by dividing the mole of that component by the total moles of the solution. Here is how it is done:

mole fraction = mole of one of the component of the solution/ total moles of the solution

Percentage by weight of ethyl alcohol is 46%...that means in 100 g of this solution is 46 g while the mass of the water will be 54% of 100 g = 54g.

Find the moles of water and the ethyl alcohol {molar mass of water(H₂O) = 18 and molar mass of ethyl alcohol(C₂H₆O = 46}

Moles = mass/molar mass

moles of ethanol = 46/46 = 1

moles of water = 54/18 = 3

total moles = 1 + 3 = 4

Mole fraction of ethanol is:

Mole of ethanol = 1/4

Total mole of solution

Therefore the mole fraction is 1/4 or 0.25

Answer 2

Answer:

see the answer in the attachment ❤