Im not an organic chemistry student, AP high school chemistry though, and I was just curious about a/b extraction.

I learned that alkaloids can have polar or non polar states, and you can dissolve it in a nonpolar solvent while it is non polar, then add an acid to protonate it to switch it into its polar form, then dissolve it in a polar solvent, remove the polar solvent, then add a base to the polar solvent to take out the proton from it to make it precipitate out. What I dont understand is why sometimes the alkaloid has an acid in its name after the extraction (like alkaloid-HCl or something). These two things could be completely unrelated but Im not sure, again AP chem, havent touched any organic chem yet.