Question

Find out the oxidation number of Al in AI,O,​

Answer 1

Answer:

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Explanation:

1. Al2O3 is a neutral compound

2. This implies that the sum of all oxidation numbers is zero

3. Oxygen has oxidation number -2 (unless in a peroxide, pure oxygen, or in combination with fluoride)

4. We have 2 aluminium atoms and 3 oxygen atoms

5. So 2 times ‘oxidation number of aluminium’ plus 3 times (-2) is equal to zero

6. Oxidation number of aluminium = 1/2 (0- -6)=+3