Question

Complete the following reactions and identify the conjugate acid–base pairs if the reactant acts as an acid.​

Part A

HCOOH(aq)+H2O(l)⇌

Formic acid

Express your answer as a chemical equation. Identify all of the phases in your answer.

Part C

H2PO4−(aq)+H2O(l)⇌

Acid

Express your answer as a chemical equation. Identify all of the phases in your answer.

Part E

HCO3−(aq)+H2O(l)⇌

Acid

Express your answer as a chemical equation. Identify all of the phases in your answer.

Answer 1

Ans.

When an acid loses a proton , then , conjugate base is formed and when a base gains a proton , then , conjugate acid is formed .

Part A :  

HCOOH(aq) + H2O(l) <---> HCOO-(aq) + H3O+(aq)

Conjugate acid = H3O+

Conjugate base = HCOO-

Part C :

H2PO4-(aq) + H2O(l) <---> HPO42-(aq) + H3O+(aq)

Conjugate Acid = H3O+

Conjugate Base = HPO42-

Part E :

HCO3-(aq) + H2O(l) <----> CO32-(aq) + H3O+(aq)

Conjugate Acid = H3O+

Conjugate Base = CO32-