The chemical equation of the reaction of sodium hydroxide and dilute hydrochloric acid is: HCl + NaOH = NaCl + H2O, and the two neutralize the reaction without obvious phenomena.

hydrochloric acid reacts with sodium hydroxide solution to form sodium chloride and water, and strong acid and strong alkali neutralize the reaction without obvious phenomena. if the colorless phthalide reagent is added dropwise in the sodium hydroxide solution, the colorless phenolphthalein turns red, and dilute hydrochloric acid is added drop by drop and oscillates, and when the red suddenly fades, the acid and base are just neutralized, generating sodium chloride and water.

uses of sodium chloride

1, used in the manufacture of soda ash and caustic soda and other chemical products, ore smelting.

2, food industry and fishery for salting, but also as a raw material for seasonings and refined salt.

3, when electrolyzing the aqueous solution of sodium chloride, hydrogen and chlorine will be generated, chlorine is widely used in chemical industry, and can be used for the synthesis of polyvinyl chloride, insecticides, hydrochloric acid and so on.