Na{H_2}P{O_4} and NaHP{O_3} are acid salts.

(A) True

(B) False

To determine whether Na₂HPO₄ (disodium hydrogen phosphate) and NaHPO₃ (sodium hydrogen phosphite) are acid salts, we need to understand what an acid salt is. An acid salt is formed when a weak acid reacts with a strong base, resulting in a salt that still contains an ionizable hydrogen atom. Now, let’s analyze each compound:

Examining Na₂HPO₄

Na₂HPO₄ is derived from phosphoric acid (H₃PO₄). When one hydrogen ion is replaced by sodium, it retains one ionizable hydrogen atom, which is characteristic of an acid salt. Therefore, Na₂HPO₄ is indeed an acid salt.

Analyzing NaHPO₃

Next, NaHPO₃ comes from phosphorous acid (H₃PO₃). Similar to the previous case, it has one hydrogen ion that can still be released, indicating that it also qualifies as an acid salt. Thus, NaHPO₃ is also an acid salt.

Final Assessment

Both compounds, Na₂HPO₄ and NaHPO₃, meet the criteria for acid salts. Therefore, the statement that Na₂HPO₄ and NaHPO₃ are acid salts is:

• (A) True

In summary, both compounds retain an ionizable hydrogen and are formed from weak acids, confirming their classification as acid salts.