Acid and Base Analysis Mount Clear College Chemistry

Brønsted–Lowry acid-base theory Revision

Acid-Base strength

pH

Definitions Methyl Orange endpoint

TITRATION CURVES

Titration Curves

Strong Base

Strong Acid

Indicators The equivalence point of an acid-base reaction is not necessarily near pH=7. Indicator end-point is ideally near the equivalence point.

Back titration If a reaction does not produce a sharp end, one can be manufactured by using a strong acid or base as needed. For a weak acid, react with a known, excess of strong base. Titrate the remaining strong base to work back to the original amount of weak acid. Known amount of strong base Unknown Titrate the remaining strong base