Question

Statement: The second dissociation constant of fumaric acid is greater than maleic acid.

State whether the given statement is true or false.

• A. True
• B. False

Answer 1

The correct option is A True

The difference is because of the structures of the singly dissociated ions. Fumaric acid is simply two different carboxylate groups that dissociate somewhat independently maleic acid on the other hand dissociated, once to form a more stable resonating ring structure. It is a $1,4$- dicarbonyl with an alkene between $2$ and $3$, this means the remaining hydrogen can alternate between the oxygen to form an alternating $3$ centre bond since this is adjoined by an alkene it forms a seven constituent aromatic ring.

SO, the dissociation constant of fumaric acid is greater than maleic acid.

Hence, the given statement is $\text{true}$