MgCl2 -> Mg(+2) Cl(-1) Cr2S3 -> Cr(+3) S(-2) NaBr -> Na(+1) Br(-1) Al2(CO3)3 -> Al(+3) CO3 (-2) CaI2 -> Ca(+2) I(-1) Na2SO3 -> Na(+1) SO3(-2) Cu(NO3)2 -> Cu(+2) NO3(-1)
Fe(SO4)3 -> Fe(+3) SO4(-2) Ca3(PO4)2 -> Ca(+2) PO4(-3)
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Mg=II
Cl=I
Cr2S3
Cr=III
S=II
NaBr
Na=I
Br=I
Al2(CO3)3
Al=III
CO3=II
CaI2
Ca=II
I=I
Na2SO3
Na=I
SO3=II
Cu(NO3)2
Cu=II
NO3=I
Fe2(SO4)3
Fe=III
SO4=II
Ca3(PO4)2
Ca=II
PO4=III
Cr-3 s-2
na-1 br-1
al-3 co3-2
ca-2 I-1
na-1 So3--2
Cu-2 no3-1
Fe-3 so4-2
ca-2 po4-3
MgCl2 -> Mg(+2) Cl(-1)
Cr2S3 -> Cr(+3) S(-2)
NaBr -> Na(+1) Br(-1)
Al2(CO3)3 -> Al(+3) CO3 (-2)
CaI2 -> Ca(+2) I(-1)
Na2SO3 -> Na(+1) SO3(-2)
Cu(NO3)2 -> Cu(+2) NO3(-1)
Fe(SO4)3 -> Fe(+3) SO4(-2)
Ca3(PO4)2 -> Ca(+2) PO4(-3)