Will addition of water to vinegar affect the determination of its concentration? Why?

Answer 1

Depends upon when the water is added. If added BEFORE the titration, of course that dilutes the acid and it will show less concentrated when titrated. If the water is added DURING the titration (washing the sides down, washing the stirring rod ( if one is used) etc will not change the end point. The reason is that the indicator will change when mols acid = mols base and the addition of water doesn't change the mols acid or mols base. When I taught and I did a titration demonstration, I always washed the sides down and waited for one of the students to ask (and they always did), "But you're adding water. Want that dilute the acid?" And I would always answer, "Yes it does but dilutes the base being adde by the same amount." The mols acid = mols base is a better answer but the students always understood the other explanation almost instantly.

Answer 2

i actually dont know lol