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How was bleach discovered?
Bleach was first discovered in 5000 B.C by Egyptians who discovered that washing and sun-drying their garments would eventually turn them white. In 3000 B.C, bleaches were made by mixing wood ashes and water together to make lye solutions. THIS LYE SOLUTION IS MADE FROM WOOD ASHES AND WATER.
How is bleaching powder obtained?
Bleaching powder is produced by the reaction of calcium hydroxide with chlorine. Calcium hydroxide is also known as slaked lime. When chlorine gas is passed over the dry slaked lime thus bleaching powder and water is produced.
Where is bleach found?
The active ingredient in household bleach is sodium hypochlorite, which is derived from salt. In fact, Clorox is headquartered in Oakland, California because we started making bleach here by running electricity through salt water from San Francisco Bay! So household bleach begins and ends as salt and water.
Who first made bleach?
Scottish chemist and industrialist Charles Tennant proposed in 1798 a solution of calcium hypochlorite as an alternative for Javel water, and patented bleaching powder (solid calcium hypochlorite) in 1799.
Is calcium a hypochlorite?
Calcium hypochlorite is an inorganic compound with formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent.
How is bleaching powder manufactured 10?
Preparation of Bleaching Power : Chlorine gas is produced during electrolysis of aqueous sodium chloride. This chlorine gas is used for the manufacture of bleaching powder. Bleaching powder is produced by the action of a chlorine on slaked lime.
Is bleach natural?
Bleach is a chemical compound derived from natural sources used to whiten fabrics. Bleach works by the process of oxidation, or the alteration of a compound by the introduction of oxygen molecules.
What is the formula of hypochlorite?
ClO⁻Hypochlorite / Formula
What is plaster of Paris?
plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris.
Who invented bleach?
Chlorine-based bleaches, which shortened that process from months to hours, were invented in Europe in the late 18th century. Swedish chemist Carl Wilhelm Scheele discovered chlorine in 1774, and in 1785 French scientist Claude Berthollet recognized that it could be used to bleach fabrics.
What is bleaching powder and it’s Formula?
Bleaching powder is a pale yellowish powder existing with a strong smell of chlorine.
What is bleaching powder I how is it prepared?
Bleaching powder is calcium oxychloride. It is prepared by the action of chlorine on dry slaked lime. (i) Used for bleaching cotton and linen in the textile industry and wood pulp in the paper industry etc.
What are the uses of bleaching powder?
Uses of Bleaching Powder It is used for bleaching dirty clothes in the laundry, as a bleaching agent for cotton and linen in the textile industry. It is a strong oxidizing agent hence used as an oxidizer in many industries. It is used as a disinfectant which is used for disinfecting water to make potable water.
What is the formula for bleaching powder?
The correct formula for Bleaching powder is CaOCl2. This means that one chlorine is directly bonded to calcium while other to oxygen atom . This is why when we try to calculate Chlorine’s Oxodation number, it comes out to be zero.