temperature of laboratory preparation of hydrogen chloride is not less than 200 degree celsius .Give three reasons
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In the laboratory preparation of hydrogen chloride from sodium chloride, the gas can be obtained both below and above 200° C. However, the lower temperature is preferred because a higher temperature causes sodium sulphate to form a hard crust, which sticks to the bottom of the flask, and is difficult to remove.
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SODIUM BISULPHATE REACTS WITH COMMON SALT TO FORM SODIUM SULPHATE.
THE SODIUM SULPHATE SO FORMED FUSES IN GLASS APPARATUS AND RENDERS IT USELESS.
NaHO4 + NaCL DIFFUSED -------> LIGHT Na2SO4 + HCL.
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