Buffering Action of Alka-Selzter

excerpted from Chemical Demonstrations, Shakhashiri, p. 186, vol 3.



  1. Pour 200 mL water and add 5 drops of universal indicator to each beaker.
  2. While stirring add 10 drops of pH 7 buffer to adjust to same color.
  3. Arrange breaker in front of white background.
  4. Fill burets with 50 mL NaOH (in buret with teflon stopcock) and 50 mL HCl.