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Cell BioChem

Calculating pH, Ka, grams, and amounts of an acid for making a buffer

1. Calculate the pH of a solution which is 0.428 M in oxalic acid and 1.44 M in oxalate. 2. What is the pH of a solution that is 45.5 mM in acetic acid and 1.11 M in acetate? 3. A solution which is 3.19X10 to the -3 M in an acid (HA) and 6.78x10 to the -3 M in its conjugate base (A-) is found to have a pH of 8.65. What i

Determining the pKa of an acid.

For a weak electrolyte that ionizes as: HX --> H+ + X- construct a buffer with a ratio of 5 moles of HX/2.1 moles X-. The reaction is maintained at pH = 8.7. What is the pKa of the acid?