Chapter 14, Problem 26QAP

You want to make a buffer with a pH of 10.00 from ${\text{NH}}_4{}^{+}/{\text{NH}}_3$.

(a) What must the $\left[{\text{NH}}_4{}^{+}\right]/\left[{\text{NH}}_3\right]$ratio be?

(b) How many moles of NH₄Cl must be added to 465 mL of an aqueous solution of 1.24 M NH₃ to give this pH?

(c) How many milliliters of 0.236 M NH₃ must be added to 2.08 g of NH₄Cl to give this pH?

(d) What volume of 0.499 M NH₃ must be added to 395 mL, of 0.109 M NH₄Cl to give this pH?