Question

The wall of the flask is periodically rinsed with the previously boiled deionized water from the wash bottle. does this titrimetric technique result in an increase, a decrease, or have no effect on the reported acetic acid in the vinegar

Answer 1

This technique has no effect on the percent of acetic acid in the vinegar, as deionized water does not affect the number balance of H+ hydronium ions or OH- hydroxide ions. This is done just to make the endpoint reading easier.