Question

briefly explain why adding laboratory water to the vinegar sample in the reaction flask prior to beginning the titration does not affect the results of your determination of the molarity of ch3cooh in your vinegar sample.

Answer 1

Adding water to the vinegar before titration does not alter the molarity of acetic acid determined because the titration process depends only on the stoichiometric relationship between the analyte and titrant, and the moles of acetic acid remain constant.

Step-by-step explanation:

Adding laboratory water to the vinegar sample in the reaction flask before beginning the titration does not affect the results of the determination of the molarity of acetic acid (CH3COOH) in the vinegar sample because titration calculations are based on the number of moles of the substance being titrated (the analyte) and the moles of the titrant used to reach the equivalence point. The stoichiometry of the reaction determines the relationship between the titrant and the analyte. Since dilution with water does not change the number of moles of acetic acid present in the vinegar, the overall molarity calculation remains unaffected. Only the volume of the titrant (for example, a standardized NaOH solution) required to reach the equivalence point, where all moles of acid have reacted with the base, is relevant to determine the molarity of the acid in the vinegar.