1) Al2S3+6H2O=3H2S↑+2Al(OH)3↓
2K2CrO4+H2SO4=K2Cr2O7+K2SO4+
+H2O
2FeCl2+Cl2=2FeCl3
KCN+HNO3=KNO3+HCN↑
4Fe+6H2O+3O2=4Fe(OH)3
MoO3+3C=Mo+3CO
NH4NO2=N2↑+2H2O
CuSO4+Mg=Cu+MgSO4
2KMnO4=K2MnO4+MnO2+O2
2Mg+O2=2MgO
2) H2SO4=2H{+} + SO4{2-}
CsOH=Cs{+} + OH{-}
BaCl2=Ba{2+} + 2Cl{-}
NaHCO3=Na{+} + HCO3{-}
HI=H{+} + I{-}
TlOH=Tl{+} + OH{-}
KMnO4=K{+} + MnO4{-}
Cd(NO3)2=Cd{2+} + 2NO3{-}
NaHS=Na{+} + HS{-}
AgF=Ag{+} + F{-}
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Answers & Comments
1) Al2S3+6H2O=3H2S↑+2Al(OH)3↓
2K2CrO4+H2SO4=K2Cr2O7+K2SO4+
+H2O
2FeCl2+Cl2=2FeCl3
KCN+HNO3=KNO3+HCN↑
4Fe+6H2O+3O2=4Fe(OH)3
MoO3+3C=Mo+3CO
NH4NO2=N2↑+2H2O
CuSO4+Mg=Cu+MgSO4
2KMnO4=K2MnO4+MnO2+O2
2Mg+O2=2MgO
2) H2SO4=2H{+} + SO4{2-}
CsOH=Cs{+} + OH{-}
BaCl2=Ba{2+} + 2Cl{-}
NaHCO3=Na{+} + HCO3{-}
HI=H{+} + I{-}
TlOH=Tl{+} + OH{-}
KMnO4=K{+} + MnO4{-}
Cd(NO3)2=Cd{2+} + 2NO3{-}
NaHS=Na{+} + HS{-}
AgF=Ag{+} + F{-}