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When hypo solution react with `CuCl_(2)` and produce soluble complex, then how many no. moles of atoms present in one mole of soluble complex in co-ordination sphere

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Correct Answer - 31
`Na_(2)S_(2)O_(3).5H_(2)O + CuCl_(2) rarr Na_(4) underset("soluble complex")([Cu_(6)(S_(2)O_(3))_(5)])`
Number of atom in Co-ordination sphere `= 6 + 2 xx 5 ++ 3 xx 5 = 6 + 10 + 15 = 6 + 25 = 31`

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