Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

Cobalt is able to form the cation $\text{Co(NH}_3)_4\text{Cl}_2^{+}$. What oxidation number does cobalt have in this ion?

  • A$+1$
  • B$+2$
  • C$+3$
  • D$+6$

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