How are complex salts formed?

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Solution

$C o m p l e x s a l t s a r e f o r m e d b y t h e c o m b i n a t i o n o f s i m p l e s a l t s a n d a r e s t a b l e i n a q u e o u s s o l u t i o n t o o . F e S O_{4} + 6 K C N \to K_{4} [F e (C N)_{6}] + K_{2} S O_{4} O n d i s s o l v i n g i n w a t e r t h e y p r o d u c e c o m p l e x i o n K_{4} [F e (C N)_{6}] \to 4 K^{+} + [F e (C N)_{6}]^{4 -} T h e p r o p e r t i e s o f t h e s o l u t i o n a r e d i f f e r e n t f r o m t h e s u b s \tan c e f r o m w h i c h t h e y a r e f o r m e d .$

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