Titration Curve: Weak Base–Strong Acid Shape
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State
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.
Show
Titrating ammonia with HCl crosses its equivalence point near pH 5, below neutral.
Watch for
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.