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Solution: Strong Acids and Bases (Section)Calculate [OH-]
Chapter , Problem 46E(choose chapter or problem)
Why is pH at the equivalence point larger than 7 when you titrate a weak acid with a strong base?
(a) There is excess strong base at the equivalence point., (b) There is excess weak acid at the equivalence point.. (c) The conjugate base that is formed at the equivalence point is a strong base.. (d) The conjugate base that is formed at the equivalence point reacts with water.. (e) This statement is false: the pH is always 7 at an equivalence point in a pH titration.
Questions & Answers
QUESTION:
Why is pH at the equivalence point larger than 7 when you titrate a weak acid with a strong base?
(a) There is excess strong base at the equivalence point., (b) There is excess weak acid at the equivalence point.. (c) The conjugate base that is formed at the equivalence point is a strong base.. (d) The conjugate base that is formed at the equivalence point reacts with water.. (e) This statement is false: the pH is always 7 at an equivalence point in a pH titration.
ANSWER:
Step 1 f 2
When a weak acid is titrated with a strong base then the conjugate base formed at the equivalence point is an anion and it reacts with water due to which the solution becomes basic having . This can be explained more clearly by taking an example of weak acid and strong base .