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The end-point of an acid-base titration is not when the solution becomes neutral - it is when the number of moles of acid added is equal to the number of moles of base at the start (or the other way around), assuming that the acid is monobasic (HX + H2O --> H3O+ + X-) and the base is monoacidic (B + H2O --> BH+ + OH-).
If both acid and base are strong, the end-point will be pH7
If the acid is strong and the base is weak, the pH will be <7.
If the acid is weakand the base is strong, the pH will be >7.

2007-07-23 11:40:01 · answer #1 · answered by Chemmunicator 5 · 0 0

Technically the end-point is the point at which the indicator changes colour. The equivalence point is the moment at which the correct moles of chemicals have reacted - or, as you say, neutralisation has been achieved in the particular case of an acid-base titration.

If you select the correct indicator, the two volumes will be the same.

2007-07-23 16:57:32 · answer #2 · answered by Gervald F 7 · 0 0

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