In: Chemistry
1. (9 pts) Consider a buffer solution composed of C6H5NH3+ and C6H5NH2. (Kb for the amine base is 3.9 x 10-10)
a. What is the optimum buffer range for this mixture?
b. What ratio of C6H5NH2 to C6H5NH3+ would be needed to buffer a solution at pH 4.10?
c. What is the pH of a solution containing 0.35 M C6H5NH3+ and 0.45 M C6H5NH2?
d. What is the pH after addition of 0.0015 mol of HBr to 20 mL of the solution in part c?