A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...

Miss Fong: Well, you'll see that the acid changes its name slightly when it forms salt. Nitric becomes nitrate, hydrochloric acid becomes a chloride and sulphuric acid becomes a sulphate.

The concentration of hydrochloric acid can be increased by adding more hydrochloric acid. When this happens, the equilibrium position moves to the left, away from HCl(aq) in the equation.