How is end point differed from equivalence point?

During the process, two important stages known as endpoint and equivalence point are reached. An equivalence point in a titration refers to a point in which the added titrant is chemically equivalent to the analyte in the sample. Endpoint, on the other hand, is a point where the indicator changes its colour.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.