Question

[3]
7. Vinegar is mainly a solution of ethanoic acid. 25cm3 of vinegar were neutralized by
20cm of sodium hydroxide solution, of concentration 1 mol/dm3. What is the
concentration of ethanoic acid in the vinegar?

Answer 1

Answer:

1.the molarity of Naoh (aq)is used

2.the volume of Naoh(aq) used to neutralize the vinegar

3.the volume of vinegar used

Explanation:

Molarity = Moles of acetic acid \ Volume of vinegar (in liter)

In percentage

Mass % = [ Mass of acetic acid. / Mass of vinegar ] x 100