Question

Explain, why silver nitrate crystals are dissolved in distilled water and not in tap to prepare silver nitrate solution as a laboratory reagent.
Give one chemical test to distinguish between dilute hydrochloric acid and dilute sulphuric acid.

Answer 1

Silver nitrate crystals are dissolved in distilled water to prepare its solution and not in tap water . This is due to the reason that tap water contains chloride ions which gives white precipitate with AgNO₃ solution.
Dilute hydrochloric acid deoomposes metallic carbonates, hydrogen carbonates to give the corresponding metal chloride and carbon dioxide. The gas CO₂ liberated
with brisk effervescence while sulphuric acid does not give CO₂.