Question

A student determines the acetic acid concentration of a sample of distilled vinegar by titration of 25.00 ml of the vinegar with standardized sodium hydroxide solution using phenolphthalein as an indicator. which error will give an acetic acid content for the vinegar that is too low

Answer 1

Inaccuracy of the determined value for the acetic acid concentration of the sample can arise in many mishandling and error sources. One of the sources of error is the inaccuracy in the reading of through the glasswares used such as burette. 

Inaccuracy may also arise from the too much addition of sodium hydroxide to the solution, this means that endpoint had already been reached, however, the standard is still added.