When titrating a monoprotic strong acid with a weak base at 25°C,the
A)pH will be 7 at the equivalence point.
B)pH will be greater than 7 at the equivalence point.
C)titration will require more moles of the base than acid to reach the equivalence point.
D)titration will require more moles of acid than base to reach the equivalence point.
E)pH will be less than 7 at the equivalence point.

Question

Quizplus · Accepted Answer

When titrating a monoprotic strong acid (such as HCl) with a weak base (such as NH3) at 25°C, the pH of the solution will be less than 7 at the equivalence point. This is because the weak base is not strong enough to completely neutralize the strong acid, so there will be excess H+ ions in the solution, making it acidic. The titration will require more moles of the weak base than the strong acid because the weak base is not as effective at neutralizing the acid as a strong base would be. Therefore, the equivalence point will be reached when all of the acid has reacted with the weak base, but there will still be some H+ ions remaining in the solution, making it acidic.

When Titrating a Monoprotic Strong Acid with a Weak Base