HCl, or Hydrochloric Acid. You need an acid with Chlorine in it, and that's the most common one around, as well as the only one that I know of.
you end up with water (H2O) and Sodium chloride (table salt, NaCl)
A chemical reaction occurs between sodium hydroxide and hydrogen chloride. Adding more sodium hydroxide to the reaction causes it to speed up. If you add more of a reactant, such as sodium hydroxide, can it be considered a catalyst? Why or why not?
Acid
Add concentrated solution of Hydro chloric acid to the solution of sodium hydroxide till mixture becomes neutral (checked by litmus) then heat the mixture , when a little amount of water is left allow to cool the mixture , the crystals of sodium chloride settelted down filter and dry the crystals.
add sodium or potassium hydroxide.
Hydrochloric Acid
You can - it will neutralise the acid though, creating water.
Add acid and neutralize the solution.
A salt and water. For example if you add hydrochloric acid to sodium hydroxide (a base), you will get sodium chloride (a salt) and water. ie. HCl + NaOH -> NaCl + H2O But unless the acid and base are perfectly balanced you'll have some acid or base left over.
You would need to add Sulphuric acid to make Sodium Sulphate + Water :)
Sodium react with water forming a base - sodium hydroxide - and releasing hydrogen. Add an acid for neutralization.
Dissolve the ammonia in water to produce ammonium hydroxide then add hydrochloric acid to this to form ammonium chloride.