What is the pH of a solution that is
(a) Prepared by dissolving 3.30 g of (NH4)2SO4 in water, adding 125.0 mL of 0.1011 M NaOH, and diluting to 500.0 mL?
(b) 0.120 M in piperidine and 0.010 M in its chloride salt?
(c) 0.050 M in ethylamine and 0.167 M in its chloride salt?
(d) Prepared by dissolving 2.32 g of aniline (93.13 g/ mol) in 100 mL of 0.0200 M HCl and diluting to 250.0 mL?