Read p.574 about Ka of polyprotic acids. Kb is similar to Ka, but is for weak bases. Consult p.570-573. Some weak bases do not have their Kb values listed in the table in the back of the text. To calculate these, see p.570.
Homework: p.579 #9, 15; p.574 #13
Homework: p.579 #9, 15; p.574 #13