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3 years ago

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

Chemistry

1 answer:

mezya [45]3 years ago

3 0

Answer:

Yes, Al change oxidation number

Explanation:

$AlCl_3 +Na >NaCl+Al$

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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