Practical Chemistry

A cation is a positively charged

A cation is a positively charged ion and an anion is a negatively charged ion. Salts contain both kinds of ions.

The homogeneous mixture of salt

The homogeneous mixture of salt and solvent prepared before testing is called original solution or O.S.

Different gases are recognised by their

Different gases are recognised by their colour, smell, and confirmatory tests. For example, ammonia turns moist red litmus blue and brown with Nessler

Heating ammonium salts with sodium hydroxide

Heating ammonium salts with sodium hydroxide releases ammonia gas. The gas turns moist red litmus blue and gives brown colour with Nessler's reagent.

Lead ion gives silver black precipitate

Lead ion gives silver black precipitate with hydrogen sulphide, canary yellow with potassium iodide, mustard yellow with potassium chromate, and white