Why is:
(c) Sulphuric acid used in the preparation of $HCl$ and $HNO_{3}$? Give equations in both cases.

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Solution

Concentrated sulphuric acid has a high boiling point ($3380C$).

In the reactions where heat is involved sulphuric acid does not evaporate easily and also it is easy to separate non-volatile starting material and volatile product.

Thus, it is used for preparing volatile acids like hydrochloric acid ($HCl$) and nitric acids ($HNO_{3}$ ) from their salts by double decomposition reaction.
$NaCl + H_{2}SO_{4} \rightarrow NaHSO_{4} +HCl$

$ NaNO_{3} + H_{2}SO_{4} \rightarrow NaHSO_{4} +HNO_{3}$

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Why is :

(a) concentrated sulphuric acid kept in air tight bottles ?

(b) $H_{2} S O_{4}$ is not used as a drying agent for $H_{2} S$ ?

Why is hot concentrated Sulphuric acid not used in the preparation of Hydrogen ?

What property of conc. $H_{2} S O_{4}$ is made use of in each of the following cases ? Give an equation for the reaction in each case :

(a) in the production of HCI gas when it reacts with a chloride,

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(d) in the preparation of sulphuric acid by warming a mixture of conc.sulphuric acid and copper-turnings,

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Hydrochloric acid is used in the preparation Sulphur dioxide. Give a balanced equation to prepare Sulphur di oxide and property of $H C l$ illustrated by the reactions.

Q. In the preparation of nitric acid fromKNO₃ and NaNO₃ ,why other concentrated acids are not used in place off concentrated sulphuric acid?

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Why is: (c) Sulphuric acid used in the preparation of \(HCl\) and \(HNO_{3}\)? Give equations in both cases.

Why is:
(c) Sulphuric acid used in the preparation of \(HCl\) and \(HNO_{3}\)? Give equations in both cases.