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p-Block Elements – II — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Chemistryp-Block Elements – II2 Marks
Question
How will you prepare hydrochloric acid by laboratory method?
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Answer

It is prepared by the action of sodium chloride and concentrated sulphuric acid
- $NaCl + H _2 SO _4 \rightarrow NaHSO _4+ HCl$
- $NaHSO _4+ NaCl \rightarrow Na _2 SO _4+ HCl$
Dry hydrochloric acid is obtained by passing the gas through conc. sulphuric acid

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