An acid (such as h2so4) and a base (such as naoh) are mixed together during a titration. the equivalence point is reached when

the ph reaches its maximum value

the number of moles of h+ ions equals the number of moles of oh– ions

the ph reaches its minimum value

the number of moles of acid equals the number of moles of base

the number of moles of H+ ions equals the number of moles of OH– ions

Explanation:

The equivalence point, is the point at which the acid has completely reacted with the base.

In other words, the H+ ions from the acid have completed reacted with the OH- ions from the base, and in order to complete the reaction the moles of OH- must be equal to the number of moles of H+ in the inicial solution.

This is different to the moles of acid or base, because in this case we have two moles of H+ per mol of acid (H2SO4)