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Sodium Thiosulphate

Which complex...

Question

Which complex will form when silver bromide is treated with solution of sodium thiosulphate ?

A

N a_{3} [A g (S_{2} O_{3})_{2}]

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B

N a_{3} [A g (S_{2} O_{3})_{3}]

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C

N a_{2} [A g (S_{2} O_{3})_{2}]

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D

N a_{3} [A g (S_{2} O_{3})_{4}]

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Solution

The correct option is A $N a_{3} [A g (S_{2} O_{3})_{2}]$
When a solution of sodium thiosulohate is treated with AgBr:
$A g B r + 2 N a_{2} S_{2} O_{3} ⟶ N a_{3} [A g (S_{2} O_{3})_{2}] + N a B r$

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