What is the oxidation number of chromium in [Cr(NH₃)₄Cl₂]Cl ?

Question

Quizplus · Accepted Answer

According to the rules of oxidation states, the overall charge of a compound is equal to the sum of the oxidation states of all the atoms in the compound. Since Cl has a fixed oxidation state of -1, the sum of the oxidation states of all the other atoms in the compound must add up to +1 (the charge of the Cl- ion). There are multiple S, N, and H atoms in the compound with variable oxidation states, so we cannot determine their oxidation states without more information. However, we do know that the sum of their oxidation states must add up to -1 to balance the +1 charge of the Cl- ion. Therefore, the oxidation state of Cr must be +3 to make the sum of the oxidation states equal to +1.

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What Is the Oxidation Number of Chromium in [Cr(NH₃)₄Cl₂]Cl