identify reactants?

Question

can somone point out which of these are no reaction and which is a complex ion? Its for a lab where I nee to identify mystery reactants but I'm not sure about thes equations.

(NH4)2CO3 + NaOH
(NH4)2CO3 +HNO3
(NH4)2CO3 +KI
(NH4)2CO3+ Na2S
(NH4)2CO3+ BaCl
(NH4)2CO3 + Pb(NO3)2
(NH4)2CO3+ Fe(NO3)3
(NaOH) + KI
(NaOH) + HNO3
(NaOH) + Na2s
(NaOH) + BaCl2
(NaOH) + Fe(No3)3
(NaOH) + Pb(NO3)2
HNO3 + KI
HNO3 + Na2S
HNO3 + BaCl2
HNO3 + Pb(NO3)2
HNO3 + Fe(NO3)3
KI + Na2S
KI + BaCl2
KI + Pb(NO3)2
KI + Fe(NO3)3
Na2S + BaCl
Na2S + Pb(NO3)2
Na2S + Fe(NO3)3
BaCl2 + Pb(NO3)2
BaCl2 + Fe(NO3)3
Pb(NO3) + Fe(NO3)3

Answer 1

review the soubilities, then try to answer this for your self, know what happens when NH4+ is mixed with strong base.
Know that heavy metals, Ba, Fe, Pb are insoluble in sulfides, as carbonates, and in bases (check the last for exceptions?)
Know that HNO3 can also act as an oxidizing agent as well as an acid, what ions can be oxidized?

(NH4)2CO3 + NaOH releases NH3 as gas, Na2C03 in soln
(NH4)2CO3 +HNO3 releases CO2 as gas, NH4NO3 in soln
(NH4)2CO3 +KI nothing
(NH4)2CO3+ Na2S nothing
(NH4)2CO3+ BaCl, BaCO3 is insoluble, NH4CL in soln
(NH4)2CO3 + Pb(NO3)2, PbCO3 is insoluble
(NH4)2CO3+ Fe(NO3)3, FeCO3 is insoluble
(NaOH) + KI, nothing
(NaOH) + HNO3, Heat, lots of it, NaNO3 and Water
(NaOH) + Na2s nothing
(NaOH) + BaCl2, BaOH is insoluble, NaCL in soln
(NaOH) + Fe(No3)3, FeOH insoluble, anything else ?
(NaOH) + Pb(NO3)2 Pb(OH)2 insoluble?, check
HNO3 + KI, I - is oxidized, my guess is I2, what is NO3 reduced
HNO3 + Na2S, two thing could happen, the acid makes H2S,
but NO3 if concentrated might oxidize the sulfide, check
HNO3 + BaCl2, will get some HCL gas, but equilibrium in soln
HNO3 + Pb(NO3)2, can lead ion be oxidized any more?
HNO3 + Fe(NO3)3, nothing
KI + Na2S, nothing, just ions in soln
KI + BaCl2 nothing, just ions in soln
KI + Pb(NO3)2, probably nothing
KI + Fe(NO3)3, probalby nothing, can Fe+++ oxidized I- ?
Na2S + BaCl, likely BaS is insoluble
Na2S + Pb(NO3)2, PbS is insoluble
Na2S + Fe(NO3)3, FeS is insoluble
BaCl2 + Pb(NO3)2, nothing, chlorides and nitrates of Ba and Pb are soluble
BaCl2 + Fe(NO3)3 nothing
Pb(NO3) + Fe(NO3)3 nothing