Question

calculate the mole fraction ethanol of solution prepare by dissolving 46 g of ethanol in 90g of water.
​

Answer 1

Hi,

Here is your answer

Given:

Mass of ethanol(C₂H₅OH)=46g

Mass of water(H₂O)=90g

To Find:

Mole fraction of ethanol in the solution

Solution:

Molar mass of C₂H₅OH=24+5+16+1=46

Number of moles of C₂H₅OH=Given mass/Molar mass

Number of moles of C₂H₅OH=46/46=1

Molar mass of H₂O=2+16=18

Number of moles of H₂O=90/18=5

Mole fraction of C₂H₅OH=Number of moles of C₂H₅OH/Number of moles of solution

Substituting the datas we get

Mole fraction of C₂H₅OH=1/5+1=1/6=0.16

Notes:

1. Number of moles of a substance=Given mass/Molar mass of the substance

2. Mole fraction of a substance=Number of moles of substance/Number of moles of solution.

Hope this helps you.

Answer 2

Answer:

Hey mate, here is your answer.

-------------------------------------------------------------

Hey mate, I give the answer that I know,

So please don't consider it Spam.

Hope it help.......

If it is helpful to you, please like it and mark it Brainliest, it's my Humble Request to you.

Thank you........

"Have A Great Day"

Explanation:

Ethanol 46 g/mol

Water 18 g/mol

Calculate moles of ethanol: 14.6 grams x 1 mol / 46 grams = 0.317 moles

Calculate moles of water: 53.6 grams x 1 mol / 18 grams = 2.98 moles

Mole fraction = moles of component / total moles in solution

= 0.317 / (0.317 + 2.98) = 0.0963

-------------------------------------------------------------

One more answer.

Given- Weight of ethanol - 46 gram

Weight of water - 90 gram

Molecular weight of ethanol - 46 gram

Find- Mole fraction of ethanol in solution.

Solution- Mole fraction is calculated by the help of formula -

Number of moles of component/ total number of moles in solution.

Number of moles are calculated by the formula - weight / molecular weight.

Number of moles of ethanol - 46/46

Number of moles of ethanol - 1

Molecular weight of water - 18 gram

Number of moles of water - 90/18

Number of moles of water - 5

Mole fraction of ethanol - 1 / (5 + 1)

Mole fraction of ethanol - 1/6

Mole fraction of ethanol - 0.16

Hence, mole fraction of ethanol is 0.16.