Question

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Answer 1

The question requires us to identify the spectator ions for the following chemical reaction:

`\text{NiS}_((s))+2HCl_((aq))\to NiCl_(2(aq))+H_2S_((g))`

To answer the question, we need to write the net ionic reaction.

The reaction with the ionic species, considering only those molecules in aqueous medium, would be:

`\text{NiS}_((s))+2H^++2Cl^-\to Ni^{2+^{}}+2Cl^-_{}+H_2S_((g))`

Note that we can "eliminate" the ions Cl- because there is the same amount of it on both sides of the equation:

`\text{NiS}_((s))+2H^+\to Ni^{2+^{}}+H_2S_((g))`

Therefore, since the ions Cl- can be eliminated and are not part of the net ionic equation, they are the spectator ions for this chemical reaction.