Is common salt acid or base or salt?

Answer 1

Common salt, table salt, sodium chloride, NaCl, whatever you call it is pretty much neutral in solution. This is because the double-replacement acid-base reaction that produces it has HCl and NaOH as reactants, and these are a strong acid and a strong base. Therefore, their "strength," which is a measure of their degree of ionization in solution, is about the same, and will cancel out.