Question

In the following equation, label the Bronsted-Lowry acid, base and conjugate pairs. CH3NH2 (aq) + H2PO4- (aq) ↔ CH3NH3+ (aq) + HPO42- (aq)

Answer 1

KEY POINTS: According to Bronsted-Lowry theory,compounds which accepts a proton are categorised as conjugate acid of the Bronsted-Lowry base and compounds which causes removal of protons are termed as conjugated base of a Bronsted-Lowry acid.

For example:Here,Methylamine(CH₃NH₂),a base accepts a proton(H⁺) to form a conjugate acid called methyl ammonium ion(CH₃NH₃⁺).

Similarly,an acid dihydrogen phosphate ion(H₂PO₄^-) loses a proton(H⁺) and gets converted to its conjugate base called monohydrate phosphate anion(HPO₄^2-).