When sulphuric acid is added to 1 gm of solid sodium chloride which has is released,what changes do u observe when u test the gas with dry and wet litmus paper, what is your inference from this experiement
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Sulfuric acid reacts with 1 g of solid sodium chloride to yield sodium sulfate and hydrogen chloride gas as follows:
H2SO4 + NaCl -----> Na2SO4 + HCl
When Hydrogen chloride gas reacts with a dry litmus paper, there is no reaction as the gas cannot dissociate to form any chloride or hydrogen ions in dry conditions.
However, when a moist blue litmus paper is used to test the evolved hydrogen chloride gas, the gas dissolved to form hydronium ions as follows:
HCl + H2O ----> H3O+ + Cl-
In the above reaction, water acts like a base and HCl forms the acid, which turns the color of the litmus paper.
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