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How do I name the following compounds;

K2S2O8, S2O8{-2}, Na2S2O3 and S2O3{-2}

3 answers

I got
1)Potassium persulfate
2)persulfate ion
3)Sodium thiosufate
4)thiosulfate ion
posassium hyposulfite (this compound has a lot of common names, such as potassium dithionite.

hyposulfite ion.
correct. Its IUPAC name is trioxido-1κ3O-disulfate(S—S)(2−)
correct.
Potasssium Persulfate
Persulfate Ion
Sodium TrioSulphate
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