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Concept explainers
Interpretation:
The given
Concept Introduction:
If the oxidation number is increases, then the species get oxidized.
If the oxidation number is decreased, then the species get reduced.
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Answer to Problem 41A
The balanced reaction is shown below:
Explanation of Solution
The calculation of oxidation number is shown below:
The oxidation number of Al in Al2O3 = 2x + 3(-2) = 0
= 2x = 6
x = 3
The oxidation number of C(s) = 0
The oxidation number of Al(s) = 0
The oxidation number of C in CO2 = x + 2(-2) = 0
x = 4
The reduction half reaction is shown below:
The oxidation half reaction is shown below:
To balance the number of electrons equation (1) is multiply by 4 and equation (2) is multiply by 3 as shown below:
The overall reaction is written by addition of equation of (3) and (4) as shown below:
Now transform the atoms in molecules:
The balanced reaction is shown below:
Chapter 7 Solutions
World of Chemistry
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