This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: point and (b) the second stoichiometric point in a titration of 25.00 mL of 0.010 M H 2 SO 3 (aq)? pK a1 = 1.81; pK a2 = 6.91 5. Estimate the pH of the solution that results when each of the following solutions is added to 50.0 mL of 0.275 M Na 2 HPO 4 (aq): (a) 50.0 mL of 0.275 M HCl(aq); (b) 75.0 mL of 0.275 M HCl(aq); (c) 25.0 mL of 0.275 M HCl(aq). pK a1 = 2.12; pK a2 = 7.21; pK a3 = 12.68 6. What volume of 0.020 M NaOH(aq) is required to reach (a) the first stoichiometric point and (b) the second stoichiometric point in a titration of 30.00 mL of 0.010 M H 3 PO 4 (aq)? 7. A sample of 0.100 M H 2 S(aq) of volume 20.0 mL was titrated with 0.300 M NaOH(aq). Identify the primary species in solution and the pH after the addition of the following volumes of NaOH solution: (a) 5.0 mL, (b) 13.4 mL. pK a1 = 6.89; pK a2 = 14.15...
View Full Document