Question

1. A 10.0 mL vinegar sample was completely neutralized by 22.5 mL 0.20 M NaOH solution....

1. A 10.0 mL vinegar sample was completely neutralized by 22.5 mL 0.20 M NaOH solution.

A. Calculate molarity of the vinegar?

B. and % of Acetic acid in vinegar?

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Answer #1

Given data,

Volume of vinegar = 10.0 mL

Volume of NaOH = 22.5 mL

M1 x V1 = M2 x V2

M1 x 10 = 22.5 x 0.2

M1 = ( 22.5 x 0.2 ) / 10

= 0.45M

weight of acetic acid in a liter of solution = molartiy x molar mass

= 0.45 x 60g/mol

= 27 g /L

Thus % by weight of acetic acid in solution = 2.7%

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