Question

Using tables of solubility products, write the net ionic equations for what should happen in the following:

a. A solution of Silver Nitrate is ADDED to solid Lead Iodide

b. A solution of Sodium Sulfide is ADDED to a solution of Silver Chromate

Answer 1

a) solution of AgNO3 when added to PbI2 yellow color precipitate will form

2 AgNO3 (aq) + PbI2 (aq) --------------------------> 2 AgI (s) + Pb(NO3)2 (aq)

net ionic equation : 2 Ag+ (aq) + 2 I- (aq) -------------------> 2 AgI (s)

(b) when solution sodium sulfide addedd to silver chromate silver sulfide black precipitate is formed

Na2S (aq) + Ag2CrO4 (aq) ------------------> Ag2S (s) + Na2CrO4 (aq)

net ionic equation : S^-2 (aq) + 2 Ag+ (aq) --------------------> Ag2S (s)