Chemistry
Give reasons for the following :
In the laboratory preparation of HCl acid from NaCl and conc. H2SO4, the residual salt formed at temperatures above 200°C forms a hard crust and sticks to the glass.
Hydrogen Chloride
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Answer
At temperatures above 200°C, Sodium sulphate is formed. It forms a hard crust, sticks to the glass and is difficult to remove.
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