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Write the total ionic equation for this reac- tion occuring in water: Calcium sulfide and iron(II) bromide are mixed to form iron(II) sulfide and calcium bromide.
1. Ca2+ + S2- + Fe2+ + 2 Br- ?
Fe2+ +S2- +Ca2+ +2Br-
2. S2- + Fe2+ ? FeS
3. Ca2+ + S2- + Fe2+ + 2 Br- ?
FeS + CaBr2
4. Ca2+ + 2 Br- ? CaBr2
5. CaS + Fe2+ + 2 Br- ? FeS + CaBr2
6. CaS + Fe2+ + 2 Br- ?
Fe2+ + S2- + CaBr2
7. Ca2+ + S2- + Fe2+ + 2 Br- ? FeS+Ca2++2Br-
8. Ca2+ + S2- + FeBr2 ? FeS+Ca2++2Br-

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