Question

calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.40​

Answer 1

Answer:

Moles of ethanol= 0.40 mol

Moles of water= 1 - 0.40 = 0.6 mol

Mass of ethanol= 0.40 mol × 46 g/mol = 18.4 g

Mass of water= 0.6 mol × 18 g/mol = 10.8 g

Mass of the solution= 18.4 + 10.8 = 29.2 g

Assuming density of water be 1 g/ml.

Volume of Solution= mass/density = 29.2/1 = 29.2 ml = 0.0292 L

Molarity is the number of moles of solute present in 1 L solution.

Hence,

Molarity of solution= 0.40/0.0292 = 13.6 M

Answer 2

Answer:

here is your solution mate

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