Question 1
Determine the oxidation state of chromium (Cr) in the dichromate ion, $\ce{Cr2O7^{2-}}$.
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Chemistry · Unit 3 · Oxidation and reduction · Redox reactions
Determine the oxidation state (represented with the sign given before the number) of an atom in an ion or compound, e.g. +2.
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Question 2
Determine the oxidation state of nitrogen in the nitrite ion, $\text{NO}_{2}^{-}$.
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Question 3
Determine the oxidation state of chromium in the dichromate ion, $\text{Cr}_2\text{O}_7^{2-}$, and explain your reasoning using oxidation state rules.
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