Reactions of fluorine, chlorine, bromine and iodine with aluminium

Fluorine

This is a redox reaction: $2Al$ $+$ $3F_2$ $\longrightarrow$ $2Al^{3+}(F^-)_3$

→   Oxidation states:

$OS(Al): 0 \longrightarrow +3$ oxidation $OS(F): 0 \longrightarrow -1$ reduction

Chlorine

This is a redox reaction: $2Al$ $+$ $3Cl_2$ $\longrightarrow$ $2Al^{3+}(Cl^-)_3$

→   Oxidation states:

$OS(Al): 0 \longrightarrow +3$ oxidation $OS(Cl): 0 \longrightarrow -1$ reduction

Bromine

This is a redox reaction: $2Al$ $+$ $3Br_2$ $\longrightarrow$ $2Al^{3+}(Br^-)_3$

→   Oxidation states:

$OS(Al): 0 \longrightarrow +3$ oxidation $OS(Br): 0 \longrightarrow -1$ reduction

Iodine

This is a redox reaction: $2Al$ $+$ $3I_2$ $\longrightarrow$ $2Al^{3+}(I^-)_3$

→   Oxidation states:

$OS(Al): 0 \longrightarrow +3$ oxidation $OS(I): 0 \longrightarrow -1$ reduction

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