We’re being asked to determine whether Cr dissolves in 1 M HIO3
To dissolve a metal, the metal goes from its neutral form which is solid to its ionized form which is aqueous. When the metal gains a charge, it becomes aqueous. It means it dissolves within a solution.
M(s) → M+(aq)
Recall the mnemonics
cathode→ reduction → oxidation number decreases
anode → oxidation → oxidation number increases
Decide whether or not Cr dissolves in 1 M HIO3.
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