Question

A chemistry student needs 50.00g of acetic acid for an experiment. He has available 450. g of a 31.9%w solution of acetic acid in ethanol. Calculate the mass of solution the student should use

Answer 1

Answer:

The student should use 156.7 g of solution

Explanation:

31.9 %w solution of acetic acid in ethanol means 100 g of solution contains 31.9 g of acetic acid.

So, 450. g of solution contains $(\frac{31.9\times 450.}{100})g$ of acetic acid or 143.55 g of acetic acid

Alternatively, 143.55 g of acetic acid is present in 450. g of solution

So, 50.00 g of acetic acid is present in $(\frac{450.\times 50.00}{143.55})g$ solution or 156.7 g of solution

Hence the student should use 156.7 g of solution