In a buffer solution prepared from 10 mL of 3.0 M Pyridine (C5H5N) added to 20 mL of 2.0 M Pyridine Hydrochloride (C5H5NHCl) and diluted to a total volume of 200 mL – Calculate each of the following: a. The original pH of the buffer solution b. The pH upon addition of 25.0 mL of 2.0 M NaOH to part a c. The pH upon addition of 10.0 mL of 2.0 M HCl to part a

A 1.48 L buffer solution consists of 0.128 M butanoic acid and 0.338 M sodium butanoate. Calculate the pH of the solution following the addition of 0.080 moles of NaOH. Assume that any contribution of the NaOH to the volume of the solution is negligible. The K, of butanoic acid is 1.52 x 10-5. pH =

Calculate the pH at each point of a titration where 30.0 ml of 0.25M HC2H3O2 are titrated with the following volumes of 0.15M LiOH. a. 15.0ml b. 25.0ml c. 50.0ml d. 60.0ml

Dino needs to prepare 200.0 mLs of a 0.25M /0.20 M buffer solution that has pH of 4.7. To make this buffer solution, Dino has available 0.50 M solutions each of the following: Chemicals .. NH3/NH4CI •HCOOH/HCOOK HONH2/HONH3CI CH3COOH/NaCH3COO ● NH3/NH4CI HONH2/HONH3C HCOOH/HCOOK K₂ Which set of conjugate acid - base pairings should Dino select? CH3COOH/NaCH3COO 1.78 x 10-5 5.62 x 10-10 1.82 x 10-4 9.12 x 10-9