The equation that you’re looking at is Cu (copper) + HCl (hydrochloric acid) —> CuCl (copper chloride). This doesn’t work because copper chloride doesn’t contain hydrogen. The equation would only work if the reactants were chlorine and copper only.
Because the chemicals are different
A compound is a substance that can be separated into simpler substances only by chemical means.
The answer is a cation, I may be wrong but cation is plus and anion is subtract
