A) \[[Cl({{H}_{2}}O){{(N{{H}_{3}})}_{4}}Co]Cl\]
B) \[[CoCl({{H}_{2}}O){{(N{{H}_{3}})}_{4}}]Cl\]
C) \[[Co{{(N{{H}_{3}})}_{4}}({{H}_{2}}O)Cl]Cl\]
D) \[[CoCl({{H}_{2}}O){{(N{{H}_{3}})}_{4}}]C{{l}_{2}}\]
Correct Answer: D
Solution :
The correct formula of the complex tetraammine aqua chlorocobalt (III) chloride is \[[CoCl({{H}_{2}}O){{(N{{H}_{3}})}_{4}}]C{{l}_{2}}\], because in it the oxidation number of \[Co\] is \[+3\]. \[[CoCl({{H}_{2}}O){{(N{{H}_{3}})}_{4}}]C{{l}_{2}}\] \[x+(-1)+0+(0\times 4)+(-1)2=0\] \[x-3=0\] \[x=+3\]
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