The next three (3) problems deal with the titration of 321 ml of 0.501 m carbonic acid (h2co3) (ka1 = 4.3 x 10-7, ka2 = 5.6 x 10-11) with 1.9 m naoh. what is the ph of the solution at the 2nd equivalence point?

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)