ICSE Class 10 Chemistry 2020 Solved Paper

Hydrogen chloride gas is prepared in the laboratory using concentrated sulphuric acid and sodium chloride. Answer the questions that follow based on this reaction:

Question : 59

Total: 86

Give the balanced chemical equation for the reaction with suitable conditions(s) if any.

Solution:

Temperature should be below 200∘C because above 200∘C it will form sodium sulphate that will stick to the glass apparatus like a crust and cause wastage of fuel and cracking of glass apparatus.
NaCl+H2SO4

<200∘C

─────▸

NaHSO4 +HCl

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