No common ions Ag+, Hg+, Pb2+ Ag+, Hg+, Pb2+ Ag+, Hg+, Pb2+ Ca2+, Sr2+, Ba2+, Ag+, Pb2+ Most ions Most ions Most ions To predict precipitation… • Mix solutions of Ba(NO3)2 and Na2CO3. What happens? 1. Ions present: Ba2+, NO3-, Na+, CO322. Possible precipita...