One of the following buffer solutions has pOH = 5.05. Which one? Hint: Solve the general problem rather than 5 specific problems.
a. 0.10 M NH3 and 0.10 M NH4Cl
b. 0.10 M NH3 and 0.20 M NH4Cl
c. 0.20 M NH3 and 0.10 M NH4Cl
d. 0.050 M NH3 and 0.20 M NH4Cl
e. 0.20 M NH3 and 0.050 M NH4Cl
Answer: B