Question

identify one anion radical by performing dry and wet test in the given inorganic salt m3​

Answer 1

Answer:

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Answer 2

Identification of Anion Radicals

Explanation:-

Before further going to anion identification physical examination is done by the analysis of colour and smell.

1.Then after Dry heating Test is performed:-

This Test includes a small amount of salt in a dry testtube this when heated, some salts undergo decomposition and evolve gases.

$S^{-2} , CO_{3}^{-2} , NO_{2} ^{-} and SO_{3} ^{2-}$ react with dil. $H_{2}SO_{4}$ to give out $H_{2}S, CO_{2}, NO_{2}, and SO_{2}$ gases respectively. And then gases identify the presence of anion present.

Such as Carbonate Test:- On treating the solid carbonate, $CO_{2}$ is  a release with effervescence.

$CaCO_{3} + H_{2} SO_{4}$ → $CaSO_{4} + H_{2}O + CO_{2}$ ↑

2.Now, Wet Tests for Acid Radicals are performed:-

Carbonate Confirmation ($CO_{3} ^{2-}$)

Carbonate on reaction with dil. HCL release $CO_{2}$ gas that reacts with a lime ppt of calcium carbonate that turns lime-water milky.

$CaCO_{3} + 2HCl$ →  $CaCl_{2} + CO_{2} + H_{2}O$

$Ca(OH)_{2} + CO_{2}$ → $CaCO_{3}$↓ + $H_{2}O$