Question

4. Which combination of acid and base would you use to make a buffer system that has a pH of 7.72 (5pts) Show sample work.

Answer 1

4) Heo and co- Ka = 3:0x10-8 pH = -lof 3.0 - log 10-8 = -0.4771 +8 TpH = 7.522) which is near about 7.7 5 (6th OH & GGO- Ka = 1:3x10-10 pH = -6 13 - Log 10-10 = -0.1139710 IPH = 9.8867 Therefore, Heo and co- combination of and and base would be used to make a buffer system that has a pH of hear about 7.7. Huo & co- TpH = 7.522 :

by using [PH = pka = -logka ), we will calculate the pH of the buffers. 1) And 14.503 4503 115x10 pH = pka = -lopka Conjugate base = -0.176+2 = - Cory (1:5X10-2) = -los 1.5+ los q IPH = 1.8241 - 2 450 th O₂ and Hog ka = 2.4x10-12 PH = – log 2-4 - log 10-12 20,38 +12 = 11.62 pH = 11:62] 3) HF & F - Ka = 3.5 X 10-4 PH = -lo 3.5 - log 10-4 -0.544th PH = 3.456
A buffer solution is a mixture is a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. It helps to maintain a near constant pH upon the addition of small amounts of H+ or OH- ions to a solution.

HClO and ClO- combination of acid and base would be used to make a buffer system that has a pH of near about 7.7.

It can be calculated by using Henderson-Hasselbalch equation which is eplained in the following images: