The old saying is still true: "There are no stupid questions, …"
As you said, the magnesium reacts with the hydrochloric acid to produce magnesium chloride and hydrogen gas.
If you use only a few pieces of
If you use only a few drops of
If you use just the right amount of each, you will end up with just a solution of magnesium chloride in water.
The balanced equation shows what happens when we have just the right amount of each reactant:
Here is video of an experiment conducted to determine the ratio at which the magnesium and chloride ions will combine. You can see the reaction of Mg and HCl in the video.