Write the balanced complete ionic equations and net ionic equations for the reac

Question

Write the balanced complete ionic equations and net ionic equations for the reactions that occur when each of the following solutions are mixed. (Type your answers using the format [NH4]+ for NH4+ or Ca3(PO4)2 for Ca3(PO4)2. Use the lowest possible coefficients.)

(a) Pb(NO3)2(aq) and Na2S(aq)

complete ionic equation: (aq) + S2-(aq) + Pb2+(aq) + NO3-(aq) (s) + Na+(aq) + (aq)

net ionic equation: Pb2+(aq) + (aq) (s)

(b) Fe2(SO4)3(aq) and CaCl2(aq)

complete ionic equation: (aq) + SO42-(aq) + Ca2+(aq) + Cl-(aq) (s) + Fe3+(aq) + (aq)

net ionic equation: Ca2+(aq) + (aq) (s)

(c) Cr2(SO4)3(aq) and (NH4)2CO3(aq)

complete ionic equation: (aq) + CO32-(aq) + Cr3+(aq) + SO42-(aq) (s) + NH4+(aq) + (aq)

net ionic equation: Cr3+(aq) + (aq) (s)

Explanation / Answer

(a) Pb(NO3)2(aq) and Na2S(aq)

     Pb(NO3)2(aq) + Na2S(aq)-------------> PbS(s) + 2NaNO3(aq)

Pb+2(aq) +2(NO3)-(aq) + 2Na+(aq)+S-2(aq)-------------> PbS(s) + 2Na+(aq) +2NO3-(aq)

removal of spectetor ions to get net ionic equation

Pb+2(aq) +S-2(aq)-------------> PbS(s) net ionic reaction

(b) Fe2(SO4)3(aq) and CaCl2(aq)

       Fe2(sO4)3 (aq) + 3CaCl2(aq) ----------------> 3CaSo4(s) + 2FeCl3(aq)

      2Fe+2(aq) +3(sO4)- (aq) + 3Ca+2+6Cl-(aq) ----------------> 3CaSo4(s) + 2Fe+2(aq)+6Cl-(aq)

   removal of spector ions to get net ionic equation

3(sO4)- (aq) + 3Ca+2 ----------------> 3CaSo4(s) net ionic equation

(c) Cr2(SO4)3(aq) and (NH4)2CO3(aq)

   Cr2(SO4)3(aq) + (NH4)2CO3(aq)---------------> Cr2(CO3)3(s) + (NH4)2SO4(aq)

2Cr+3(aq) +3(SO4)2-(aq) + 2(NH4)+(aq) +CO32-(aq)---------------> Cr2(CO3)3(s) + 2(NH4)+(aq) +SO42-(aq)

removal of spectetor ions to get net ionic equation

2Cr+3(aq) +CO32-(aq)---------------> Cr2(CO3)3(s) net ionic equation

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