Analytical ChemistryMedium

Question

In a test tube containing a salt, a few drops of dilute $H_{2}{SO}_{4}$ was added, which gave colourless vapours having the smell of vinegar. The vapours turned the blue litmus paper red. Identify the correct anion from the following:

Options

A.Sulphide, $S^{2 -}$
B.Sulphate, ${SO}_{4}^{2 -}$
C.Acetate, ${CH}_{3}{COO}^{-}$
D.Carbonate, ${CO}_{3}^{2 -}$

Solution

Sol. [Key Concept: Salt analysis — gas evolved with dilute H2SO4]

Salt + dil.

So, correct Ans. is: Acetate, ${CH}_{3}{COO}^{-}$

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