Educator

Titrations, Indicators, Buffers

• Equipment for titration: pipet, buret, volumetric flask

• n = MV applies both to mol./L and to mmol/mL

• Do calculations at several points in strong acid/strong base titration

• Do calculations at several points in weak acid/ strong base titration; and stong acid/weak base titration

• pH at equivalence point in weak acid/strong base titration is basic; in strong acid /weak base titration is acidic

• Indicators are weak acids or bases with different colors in neutral and ionic forms

• Indicators are most useful at pH close to their pK

• Buffer solutions resist pH change if diluted, or if small amounts of strong acids or bases are added; useful in chemical and biochemical work

• Buffer solutions are made from weak acids and their salts; or weak bases and their salts