Chlorine is most commonly used to clean swimming pools; however, some people may have allergic reactions to the chlorine and hence may not be able to use the pool. Chlorine can also be used to make table salt; hydrochloric acid is reacted with sodium hydroxide to form NaCl. | Chlorine is most commonly used to clean swimming pools; however, some people may have allergic reactions to the chlorine and hence may not be able to use the pool. Chlorine can also be used to make table salt; hydrochloric acid is reacted with sodium hydroxide to form NaCl. |