balanced net ionic equation for the following reactions:a: Pb(NO3)2 + Klb: NiCl2 + AgNO3c: Mg + H2SO4

The net ionic equation is used to represent only those species i.e. ions and molecules that participate in the reaction. The spectator ions that appears on both side of the reaction are cancelled out from total ionic equation in order to write the net ionic equation.a) Balanced equation: Pb(NO3)2 (aq) + 2 Kl (aq) -----> PbI2 (s) + 2 KNO3 (aq) Total ionic equation: Pb2+ (aq) + 2 NO3- (aq) + 2 K+ (aq) + 2 I- (aq)-----> PbI2 (s) + 2 K+ (aq)+ 2 NO3- (aq) Here K+and NO3- are the spectator ions hence it can be cancelled out, so we have Net ionic equation: Pb2+ (aq) + 2 I- (aq)-----> PbI2 (s) b) Balanced equation: NiCl2 (aq) + 2 AgNO3 (aq) -----> 2 AgCl (s) + Ni(NO3)2 (aq) Total ionic equation: Ni2+ (aq) + 2 Cl- (aq) + 2 Ag+ (aq) + 2 NO3- (aq) -----> 2 AgCl (s) +Ni2+ (aq) + 2 NO3- (aq) Here, Ni2+ and NO3- are the spectator ions hence it can be cancelled out, so we have Net ionic equation: 2 Cl- (aq) + 2 Ag+ (aq) -----> 2 AgCl (s) c) Balanced equation: Mg (s) + H2SO4 (aq) -----> MgSO4 (aq) + H2 (g) Total ionic equation: Mg (s) + 2 H+(aq) + SO42-(aq) -----> Mg2+(aq )+ SO42- (aq) + H2 (g) Here SO42- is the spectator ions hence it can be cancelled out, so we have Net ionic equation: Mg (s) + 2 H+ -----> Mg2+ + H2 (g)