Determine the valence of acid residues of acids H2S HBr KMnO4 H3PO4 H2SO4.

The valence of an atom is its ability to form a certain number of chemical bonds with other atoms. Valence is defined as the number of electron pairs by which a given atom is bound to other atoms.
1) H-1, S-2
2) H-1, Br-1
3) K-1, Mn-7, O-2 (MnO4 2-)
4) H-1, P-4, O-2 (PO4 3-)
5) H-1, S-2, O-2 (SO4 2-)



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