SATHEE: Extraction of Metals - Result Question 72

Extraction of Metals - Result Question 72

####74. Give the number of water molecule (s) directly bonded to the metal centre in $C u S O_{4} \cdot 5 H_{2} O$ .

(2009, 2M)

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Solution:

Four, the complex has formula $[C u {(H_{2} O)}_{4}] S O_{4} \cdot H_{2} O$

$A g B r + 2 N a_{2} S_{2} O_{3} ⟶ N a_{3} [A g {(S_{2} O_{3})}_{2}] + N a B r$

(b) $N a_{2} S_{2} O_{3} + 2 H^{+} ⟶ 2 N a^{+} + H_{2} S O_{3} + S ↓$ Colloidal

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