Current is applied to a molten mixture of pbf2 , nicl2 , and cas . what is produced at each electrode? strategy rank the cations by reduction potential. the ion with the highest reduction potential is favored for reduction. rank anions by oxidation potential. the ion with the highest oxidation potential is favored for oxidation. determine the products of the favored half‑reactions.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

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