Sorry If it’s wrong but it should be c d
Answer:
H₃PO₄(aq) ⇄ H₂PO₄⁻(aq) + H⁺(aq)
Explanation:
The phosphoric acid fuel cell (PAFC) employs phosphoric acid (H₃PO₄), a weak acid that dissociates in 3 steps, each with its acid dissociation constant.
H₃PO₄(aq) ⇄ H₂PO₄⁻(aq) + H⁺(aq) Ka1
H₂PO₄⁻(aq) ⇄ HPO₄²⁻(aq) + H⁺(aq) Ka2
HPO₄²⁻(aq) ⇄ PO₄³⁻(aq) + H⁺(aq) Ka3
Antoine Lavoisier was part of a wealthy family in Paris. He pursued to study science upon realizing that chemistry or the study of the elements was not a well-studied field. His discovery of that air was a mixture of nitrogen and oxygen gave rise to the concept of COMBUSTION after repeating the experiments made by Priestly using mercury and other metal oxides.
The event was such a history-making because it disproved that concept that air was a pure substance along with 3 others: earth, fire, and water.