Question

preparation and uses of NaOH, CaOCl2, NaHCo3 ,Na2,Co3,PoP​

Answer 1

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Explanation:

1..Preparation: Sodium hydroxide is industrially produced using the electrolytic chloralkali process, in which electrolysis of aqueous sodium chloride solution gives chlorine gas and sodium hydroxide. NaOH is obtained as a 50% solution in water, and then dried to give solid sodium hydroxide flakes or pellets.

2..Chemical formula of Bleaching Powder is CaOCl2 and its Chemical name is Calcium Oxychloride. It is Prepared by Chlorine gas over dry slaked lime. Generally this method is used in large scale preparation of bleaching powder.

3..The chemical name of baking soda is sodium hydrogen carbonate.

The formula of baking soda is NaHCO3.

It is prepared by reaction of cold and concentrated solution of sodium chloride with ammonia and carbon dioxide.

(1) It is a white crystal which are sparingly soluble in water.

4..Uses of Sodium Carbonate (Na2CO3)

Also used in the manufacture of water glass (sodium silicate), borax, sodium phosphate, and many other sodium compounds. It is used as water softener – Hard water which consists of magnesium and calcium ions are precipitated by carbonate.

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Answer 2

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