# Tag Info

For the first question, Ben Norris has already provided a way to solve it. Coming to the second part of the question, I'll suggest you to take a look at the following graph for maleic acid. $\ce{H2M}$ denotes maleic acid, $\ce{HM-}$ denotes hydrogen maleate and $\ce{M^2-}$ denotes maleate. You can clearly see that $\ce{H2M}$ and $\ce{M^{2-}}$ can never be ...