Question

This is the equation for the thermite reaction:

Answer 1

The charge of Fe in Fe₂O₃ is +3.

Let's consider the equation for the thermite reaction:

Fe₂O₃ + 2 Al ⇒ Al₂O₃ + 2 Fe

One of the reactants is ferric oxide, we can calculate the charge of Fe in Fe₂O₃ considering that:

• The sum of the charges of the atoms is equal to the charge of the compound.
• The charge of a neutral compound is 0.
• The charge of O in oxides is -2.

The charge of Fe in Fe₂O₃ is:

$2Fe+3O = 0\\2Fe+3(-2)= 0\\Fe=+3$

The charge of Fe in Fe₂O₃ is +3.

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