Question

Which of the following isomers will give white precipitate with $BaCl_{2}$solutions ?

• A. $\lbrack Co(NH_{3})_{5}SO_{4}\rbrack Br$
• B. $\lbrack Co(NH_{3})_{5}Br\rbrack SO_{4}$
• C. $\lbrack Co(NH_{3})_{4}(SO_{4})_{2}\rbrack Br$
• D. $\lbrack Co(NH_{3})_{4}Br(SO_{4})\rbrack$

Answer 1

Answer: (B)

$\lbrack Co(NH_{3})_{5}Br\rbrack SO_{4}$

Answer 2

$\lbrack Co(NH_{3})_{5}Br\rbrack SO_{4}$ $\lbrack Co(NH_{3})_{5}Br\rbrack^{2 +} + SO_{4}^{2 -}$

$SO_{4}^{2 -} + BaCl_{2} \rightarrow \underset{whiteppt}{BaSO_{4}} + 2Cl^{-}$