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pH Calculations, Polyprotic Acids

  • Use approximations (the 5% rule) in calculating pH in solutions of weak acids or bases

  • Conjugate bases of weak acids are weak bases and vice-versa

  • For conjugates KaKb = Kw

  • Do calculations of pH in solutions of conjugates like acetate and ammonium ions

  • For polyprotic acids successive Ka values get (much) smaller

  • Do calculations of pH in solutions of phosphoric acid, phosphate salts

pH Calculations, Polyprotic Acids

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Advanced Placement Chemistry