If all of the below solutions are 0.5M in each of the compounds, what is the con

Question

If all of the below solutions are 0.5M in each of the compounds, what is the concentration (M) of each ion in solution?
a. Ni(NOsub3)sub2(aq) and CaClsub2(aq)
b. Ksub2COsub3(aq) and MgIsub2(aq)

Explanation / Answer

1. K2S(aq) + Ni(NO3)2(aq) => 2KNO3(aq) + NiS(s) 2K+(aq) + S2-(aq) + Ni2+(aq) + 2[NO3]-(aq) => 2K+(aq) + 2[NO3]- + NiS(s) S2-(aq) + Ni2+(aq) => NiS(s) 2. CaCl2(aq) + Na2SO4(aq) => 2NaCl(aq) + CaSO4(s) Ca2+(aq) + 2Cl-(aq) + 2Na+(aq) + [SO4]2- => 2Na+(aq) + 2Cl-(aq) + CaSO4(s) Ca2+(aq) + [SO4]2- => CaSO4(s) 3. Pb(NO3)2 + 2KCl => PbCl2(s) + 2KNO3(aq) Pb2+(aq) + 2[NO3]-(aq) + 2K+(aq) + 2Cl-(aq) => PbCl2(s) + 2K+(aq) + 2[NO3]-(aq) Pb2+(aq) + 2Cl-(aq) => PbCl2(s) 4. FeSO4(aq) + KCl(aq) => NR

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