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Identify the following: Na(2)CO(3)over...

Identify the following:
`Na_(2)CO_(3)overset(So_(2))rarr A overset(Na_(2)CO_(3))rarr B overset("Element s")underset(Delta)rarr C overset(I_(2))rarr D`
Also mention the oxidation state of S in all the compounds.

Text Solution

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`Na_(2)CO_(3) + 2SO_(2) + H_(2)O rarr 2NaHSO_(3) + CO_(2)`
`2NaHSO_(3) + Na_(2)CO_(3) rarr 2NA_(2)SO_(3) + H_(2)O + CO_(3)`
`Na_(2) SO_(3) + S rarr Na_(2) S_(2)O_(3)`
`2Na_(2)S_(2)O_(3) + I_(2) overset(Delta)rarr Na_(2)S_(4)O_(6) + 2NaI`
Oxidation states of sulphur :
`NaHSO_(3) (+6) Na_(2)SO_(3)(+6)`
`Na_(2)S_(2)O_(3) +(+2) or (+5 and - 1)`
`Na_(2)S_(4)O_(6) (+2) or (+5 and 0)`
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