EVERYDAY SCIENCE

Detailed explanation-1: -Inorganic salts can be obtained with a base through complete or partial neutralization of acid. The part that the acid contributes is called anion in the formation of a salt and the part that the base contributes is called cation.

Detailed explanation-2: -To 0 ml of the given salt solution few drops of sodium hydroxide solution is added shaken well and noted the smell of the issuing gas. Confirmatory test for ammonium To the above solution few drops of Nessler’s reagent is added. Result: Basic radical present in the given salt is Ammonium (NH 4 +).

Detailed explanation-3: -Take 0.1 g of salt in a test tube and add 1-2 mL of NaOH solution to it and heat. If there is a smell of ammonia, this indicates the presence of ammonium ions. Bring a glass rod dipped in hydrochloric acid near the mouth of the test tube. White fumes are observed.

Detailed explanation-4: -That is, when the detection of group III cations is done, these anions get precipitated and get wrongly analysed as group III cations. Therefore, it is necessary to have information about the presence of these anions so that we can proceed accordingly after removal of these anions from the solution.