Question

Given below are two statements:
Statement (I): Aqueous solution of ammonium carbonate is basic.
Statement (II): Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on $K_a$ and $K_b$ value of acid and the base forming it.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are correct
• B. Statement I is correct but Statement II is incorrect
• C. Both Statement I and Statement II are incorrect
• D. Statement I is incorrect but Statement II is correct

Answer 1

Answer: (A)

Both Statement I and Statement II are correct

Answer 2

Statement I: Ammonium carbonate (NH4)2CO3 is basic in solution because it forms a weak acid (NH4+) and a weak base (CO32-). The carbonate ion (CO32-) can accept protons, making the solution basic.

Statement II: This statement is also correct as the pH of a salt solution formed from a weak acid and a weak base depends on the relative values of Ka and Kb.

So, Statement I and II both are correct.