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Oxidation Number Method

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Question

What is the stoichiometric coefficient of $A l^{3 +}$ in the reaction? $C a + A l^{3 +} \to C a^{2 +} + A l$

A

2

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B

1

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C

3

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D

4

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Solution

The correct option is A
2

$3 C a + 2 A l^{3 +} \to 3 C a^{2 +} + 2 A l$

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.
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