Chemistry / Chem 1878 · Atom · ~20 seconds
Titration Curve: Weak Base–Strong Acid Shape
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A weak base–strong acid titration curve starts lower than a strong base's, buffers near half-equivalence, and reaches equivalence point below pH 7 from acidic salt hydrolysis.
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Titrating ammonia with HCl crosses its equivalence point near pH 5, below neutral.
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This curve is Chem 1876's weak acid–strong base curve inverted, not the strong-acid–strong-base curve mirrored; expecting a pH-7 crossing is a standard error.