A complex of molecular formula C r C l 3 . 6 H 2 O has green colour 0.1 mole of the complex when treated with excess of A g N O 3 gave 28.7 g of white precipitate of AgCl (Molar mass = 143.5 g). The formula of the complex would be

Question

A complex of molecular formula C r C l 3 . 6 H 2 O has green colour 0.1 mole of the complex when treated with excess of A g N O 3 gave 28.7 g of white precipitate of AgCl (Molar mass = 143.5 g). The formula of the complex would be, [ C r ( H 2 O ) 6 ] C l 3, [ C r C l ( H 2 O ) 5 ] C l 2 . H 2 O, [ C r C l 2 ( H 2 O ) 4 ] C l . 2 H 2 O, [ C r ( H 2 O ) 3 C l 3 ] 3 H 2 O

MARKS App · Accepted Answer

C r C l 3 . 6 H 2 O 0.1 m o l + A g N O 3 e x c e s s → A g C l 28.7 g No. of moles of A g C l = 28.7 143.5 ≈ 0.2 m o l Hence it required 2 mole free Cl atom.

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