Acidified solutions of sodium thiosulphate are unstable because in thiosulphate
Acidified solutions of sodium thiosulphate are unstable because in thiosulphate
A. The two sulphur atoms are at unstable oxidation state of +2
B. The two sulphur atoms are at different oxidation state of +6 and -2
C. The S-S bonds are unstable
D. Thio compounds contain S in oxidation state of zero.
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Correct Answer - B
`Na_2S_2O_3+ HCI to 2NaCl + SO_2 +S+H_2O`
Sod. thiosulphate, in the presence of dil. acids decomposes to give `SO_2` and S. This is because S is in +6 and -2 oxidation state in `S_2O_3^(2-)`
`.^(-)O-undersetunderset(O)(||)oversetoverset(S)(||)S-O^-`
Structure of `S_2O_3^(2-)` ion
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