Chemistry Homework Help

Browse Homework Solutions

41 solutions

Henderson Hasselbalch Equation

Q. You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of C2H3O2−/HC2H3O2 must you use? A) 2.8 B) 0.10 C) 0.32 D) 2.0 E) 0.50

Solved • Jul 15, 2019

Henderson Hasselbalch Equation

Q. Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 200.0 mL of 0.12 M NH3. The Kb for NH3 is 1.8 × 10^-5. A) 9.45 B) 4.74 C) 9.26 D) 9.06 E) 4.55

Solved • Jul 15, 2019

Henderson Hasselbalch Equation

Q. Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 100.0 mL of 0.20 M NH3. The Kb for NH3 is 1.8 x 10^-5. A) 8.98 B) 9.13 C) 4.74 D) 9.25 E) 9.53

Solved • Jul 15, 2019

Henderson Hasselbalch Equation

Q. Which of the following acids (listed with Ka values) and their conjugate base would be best to form a buffer with a pH of 2.34? A) HClO, Ka = 2.9 x 10^-8 B) HCN, Ka = 4.9 x 10^-10 C) HC7H5O2, Ka = 6.5 x 10^-5 D) HF, Ka = 3.5 x 10^-4 E) HClO2, Ka = 1.1 x 10^-2

Solved • Jul 15, 2019

Henderson Hasselbalch Equation

Q. You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of C2H3O2−/HC2H3O2 must you use? A) 0.10 B) 0.50 C) 0.32 D) 2.8 E) 2.0

Solved • Jul 15, 2019

Henderson Hasselbalch Equation

Q. You wish to prepare an HC2H3O2 buffer with a pH of 5.44. If the pKa of is 4.74, what ratio of C2H3O2−/HC2H3O2 must you use? A) 1.4 B) 1.1 C) 0.20 D) 0.70 E) 5.0

Solved • Jul 15, 2019