What is bleaching powder? Write its formula?
SCERT Telangana Class 10 General Science Ch Acid Bases and Salts
Answers
Ca(ClO)2
Hey !!
Bleaching powder is known as chlorine of lime. It is assumed as a mixed salt of hydrochloric acid and hypochlorous acid. Bleaching powder may be called calcium chlorohypochlorite. Bleaching powder is prepared on a large scale by the action of chlorine on dry slaked lime.
Ca(OH)₂ + Cl₂ -----> H₂O + CaOCl₂
Composition of bleaching powder is also given as Ca(OCl)₂.CaCl₂ . Ca(OH)₂.2H₂O. The oxidation number of chlorine in bleaching powder are -1 and +1.
Bleaching powder is commonly used as a bleaching agent for cotton and pulp. It is used as germicide, a disinfectant and a sterilising agent. It is used to purify water.
Bleaching powder is used in the preparation of chloroform from ethyl alcohol, acetaldehyde or from acetone.
It is used as an oxidising agent and a chlorinating agent.
The formula of Bleaching powder is ''Ca(ClO)₂''