Question

When concentrated h2so4 is added to nacl solid, then hcl gas is liberated because

Answer 1

it is a double displacement reaction that takes place when concentrated sulphuric acid reacts with solid sodium chloride.

Explanation:

• The balanced chemical reaction is given below

NaCl+ (conc.) H2SO4 -----> HCl (gas) + NaHSO4

NaCl+ (conc.) H2SO4 -----> 2HCl (gas) + Na2SO4

= 2NaCl+ (conc.) 2H2SO4 -----> 3HCl (gas) + NaHSO4 +Na2SO4

• there are actually two reaction that takes place. The first reaction in which sodium chloride reacts with  sulfuric acid to form sodium bisulphate.in the second reaction there is formation of sodium sulfate and hydrochloric acid. As a result of this hydrochloric acid is liberated in both the chemical reaction. The gas which is produced turns blue litmus solution red and it signifies that it is acidic in nature.

to know more about the reaction between concentrated sulphuric acid and sodium chloride,

A gas is produced when conc. H2SO4 is added to solid sodium ..

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