The chemical equation for the reaction between sodium hydroxide and dilute hydrochloric acid is: HCl+NaOH=NaCl+H2O. A neutralization reaction occurs between the two without any obvious phenomenon.

Hydrochloric acid reacts with sodium hydroxide solution to generate sodium chloride and water. Neutralization reaction occurs with strong acid and strong alkali without obvious phenomenon. If the colorless phenolphthalein reagent is added dropwise to the sodium hydroxide solution, the colorless phenolphthalein turns red. Add dilute hydrochloric acid drop by drop and shake. When the red color suddenly fades, the acid and alkali are neutralized to generate sodium chloride and water.

Uses of sodium chloride

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

2. It is used in salting in the food industry and fishery, and can also be used as raw material for seasonings and refined table salt.

3. When electrolyzing sodium chloride aqueous solution, hydrogen and chlorine will be produced. Chlorine is widely used in the chemical industry and can be used to synthesize polyvinyl chloride, pesticides, hydrochloric acid, etc.