Suppose you would like to make a buffer that is having the pH of 3.50 and you can start with 100 mL of a 0.1000 M solution of disodium maleate and you will bubble also the HCl gas with the help of the solution until the pH is 3.50.
1. Determine the number of millimoles of HCl gas must be dissolved in the solution to reach a pH of 3.50.
2. Explain what approximations have you made in order to justify your answer
3. Determine the equilibrium concentrations of H2M, HM-, and M2- in the final buffer solution.
K1 = 4 x 10-4
K2 = 8.9 x 10-6