A student found a 500 cm³ sample of vinegar. Knowing that vinegar is a solution of ethanoic acid (CH₃COOH) and water, this student decided to take a 25.0 cm³ sample, dilute it with 25.0 cm³ of water and then react it with sodium hydroxide. The dilute sample required 37.0 cm³ of 0.850 mol dm^–3 sodium hydroxide solution to react entirely with it via the following reaction: CH3COOH(aq) + NaOH(aq) → NaCH3COO(aq) + H2O(l).

Calculate the concentration of ethanoic acid in the original sample of vinegar.

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champagneeagle35Lv1

2 Jun 2021

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Related questions

A 25.0 mL sample of vinegar (dilute acetic acid, CH3CO2H) is titrated and found to react with 94.7 mL of 0.200 MNaOH.

What is the molarity of the acetic acid solution? The reaction is
NaOH(aq)+CH3CO2H(aq)âCH3CO2Na(aq)+H2O(l)

Historically, vinegar played an important role in the preservation of food because of the acidity and antimicrobial properties of its main component, acetic acid. There are many types of vinegar found at your local grocery store, including balsamic, rice, red wine, and apple cider vinegars. A titration will help you determine the concentration of acetic acid (CH₃COOH) in vinegar. The balanced equation for the titration of acetic acid in vinegar with sodium hydroxide (NaOH) is as follows.

CH₃COOH(aq) + NaOH(aq) â H₂O(l) + NaCH₃COO(aq)

Assume you titrated a sample of vinegar using 0.145 M of sodium hydroxide. The results of this titration are shown in the following table.