They aren't always different but, by design, we try to put one as close to the other as we can.
The equivalence point is the theoretical point at which the two substances EXACTLY react with no excess of either reagent. Since a large number of solutions react with no visible effects, we add an indicator to tell us when we are at the equivalence point. So the equivalence point is where we want to go; the END POINT is where the indicator tells us to stop. But the indicator has a mind of its own and it changes at a particular point. Usually, this is not the same as the equivalence point but we TRY to make them the same. Any difference between the equivalence point and the end point causes a titration error.
why are the equivalence point and the end point different in a titration?
2 answers
Thank you so much!!