Select all that apply or are true regarding an aqueous solution containing H₂SeO3 and CsHSeO3. The addition of HCI to the above solution is expected to cause a large decrease in pH. This solution is capable of acting as a buffer. The addition of RbOH to the above solution is expected to cause only a slight increase in pH.

An analytical chemist is titrating 219.9 mL of a 0.5100 M solution of aniline (CH,NH,) with a 0.1800 M solution of HNO,. The p K, of aniline is 9.37. 3 Calculate the pH of the base solution after the chemist has added 360.5 mL of the HNO, solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO, solution added. Round your answer to 2 decimal places.

A 50.00-mL solution of 0.10 M HNO2 is titrated with a 0.10 M KOH solution. After 25.00 mL of the KOH solution is added, what is the pH in the titration flask?

Determine the pH of (a) a 0.40 M CH3CO2H solution, (b) a solution that is 0.40 M CH3CO2H and 0.20 M NaCH3CO2