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Question
What is the oxidation state of cobalt in the complex, [Co(NH3)4(H2O)Br](NO3)2?
Short Answer
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Solution
The oxidation state of cobalt in the complex, [Co(NH3)4(H2O)Br](NO3)2
Let the oxidation number of Co be x.
Co = x, NH3 = 4, H2O = 1 Br− = −1
x + (4 × 0) + (0) + (−1) = +2
x − 1 = +2
x = +3
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