Chapter 14, Problem 9ALQ

Consider a solution formed by mixing 100.0 mL of 0.10 M HA (K_a = 1.0 × 10⁻⁶), 100.00 mL of 0.10 M NaA. and 100.0 mL of 0.10 M HCl. In calculating the pH for the final solution, you would make some assumptions about the order in which various reactions occur to simplify the calculations. State these assumptions. Does it matter whether the reactions actually occur in the assumed order? Explain.