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State faraday's first law of electrolysis. Uses of: (a)H_(2)SO_(4)""(b)Chlorine Disitinguish between crystalline solids and amorphus solids. A solution of a substance having mass 1*8xx10^(-3)kg has the osmotic pressure of 0*52 atm at 280 K. Calculate the molar mass of the substance used. [Volume =1 dm^(3), ,R=8*314JK^(-1) mol^(-1)] |
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Answer» Solution :Farday's first law electrolysis states that, "The amount of substacne which is DEPOSITED on an electrode during electrolysis is directly praporational to the amount of electricity which passes through the electrolyte". Use of Sulphuric acid : (a) The major use of sulphuric acid is in the production of fertilizers, for EXAMPLE, superphosphate of lime and ammonium sulphate. (b) It is wadel use in the manufacture of chemicals, such as in making hydrochloric acid, nitric acid, sulphate slats, synthetic detergents, dyes and pigments, explosives and drugs. USES of CHLORINE : (i) Chlorine is commonly used as an antiseptic and is used to make drinking water safe and to treat swimming pools. (ii) Large amounts of chlorine are used i many industrial processes, such as in the production of paper products, plastics, dyes, textiles, medicines, antiseptics, insecticides, solvents and paints. (III) We know that, osmotic pressure is given by the formula, `MB=- W_(B)RT//piV` `=(1.8xx10^(3))(8.314)280//0.52xx1` `=(4190.25xx140^(-3))//0.52` `=8058.1xx10^(-3)=8.0581g//mol` |
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