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Colt1911 [192]
2 years ago
8

AICI, + NaNaCl + Al Did Al change oxidation number? yes No

Chemistry
1 answer:
mezya [45]2 years ago
3 0

<u>Answer:</u>

<em>Yes, Al change oxidation number</em>

<em></em>

<u>Explanation:</u>

AlCl_3  +Na >NaCl+Al

For a free element, oxidation number is 0.

Na and Al are free elements we find in the equation as they are not in combination with other elements.

For a compound, the sum of oxidation number of elements = 0.

We know oxidation number of chlorine is -1.

So let us find the oxidation number of Al in AlCl_3

Let x be the oxidation number of Al so,

AlCl_3=x+(3\times-1)=0\\\\x-3=0\\\\ x= +3

Oxidation number of Al in AlCl_3  is +3

Oxidation number of Al  changes from +3 to 0.

Decrease in oxidation number indicates AlCl_3 is getting reduced in the reaction.

Na oxidation number increases from 0 to +1 shows Na is getting oxidised in the reaction  

The change in oxidation number of the elements represents a redox reaction where both oxidation and reduction takes place simultaneously.

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