Compléter Acids and BasesVersion en ligne Introduction to Acids and Bases par Akhmad Nur Ikhwan Taqwim 1 alkali blue hydrogen 7 red hydrochloric strong Another term for a " base " is a ( n ) . Bases turn litmus paper into color . HCl is known as acid . In term " pH " the " H " stands for . NaOH is an example of a base . Acids turn litmus paper into color . A neutral solution has a pH of .