Which of the following statement(s) is/are correct?

(A) The pH of M HCl solution is 8.
(B) The conjugate base of is .
(C) increases with increase in temperature.
(D) When a solution of a weak mono

Question

Which of the following statement(s) is/are correct?

(A) The pH of  M HCl solution is 8.
(B) The conjugate base of  is .
(C)  increases with increase in temperature.
(D) When a solution of a weak monoprotic acid is titrated against a strong base, at half neutralisation point, .

Canvas Classes · Accepted Answer

Step 1 — Evaluate each statement:

(A) pH of  M HCl = 8: ✗ Incorrect. At such low concentration, the contribution of water's own  ( M) cannot be ignored. Total  M  pH ≈ 6.96, not 8.

(B) Conjugate base of  is : ✓ Correct. Removing one  from  gives .

(C)  increases with temperature: ✓ Correct. Dissociation of water is endothermic; increasing T shifts equilibrium forward  increases.

(D) At half-neutralisation, pH = : ✗ Incorrect. At half-neutralisation, [acid] = [salt], so by Henderson-Hasselbal

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