We are asked to write down the equation for the decomposition of aluminum chloride into its elements.
The chemical formula for aluminum chloride is AlCl3. It must therefore dissociate into two elements, aluminum and chloride.
Recall that chloride does not exist under normal conditions as one atom but two. So, chloride exists as a diatomic molecule, Cl2. On the other hand, aluminum exists as a solid in elemental form, Al.
Now we write a chemical decomposition reaction:
Write and balance the equation for the decomposition of aluminum chloride into its elements. phase symbols are optional.
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