omation equation to make C.H (4b.) If the mixture in (a) exactly reacts with 21.6 mL of a Na2S solution, what is the concentration of the Na2S? The two react as follows: Pb(NO3)2 (aq) + Na2S (aq) PbS (s) + 2 NaNO3 (aq) How many gras of as well in e (5a.) Write the complete ionic equation (including phases) for the reaction below. K2SO3 + Fe(NO3)2 2 KNO3 + FeSO3 (5b.) Write the net ionic equation (including phases) for the reaction from (a):