Question

1. In the experiment chemistry of household product, different household products were tested for the presence of Cl. How can you test a product have Cl present in it or not? Write in detail possible chemical test required and support your description by giving correct examples.

2. What did you test for the Garden fertilizer and how did you do it, in your chemistry of household product laboratory. Describe in detail.

Answer 1

1. If the product has Cl then we can test with silver nitrate. Cl- will give white precipitate with silver nitrate, this precipitate will be soluble in ammonia and reproduced by the addition of nitric acid.

Cl^- (aq)+AgNO3(aq) ------------------> AgCl(s) + NO3^- (aq)

AgCl(s) + 2NH3(aq) -------------------> [Ag(NH3)2)]^+(aq)+Cl^-(aq)

[Ag(NH3)2)]^+(aq)+Cl^-(aq) + 2HNO3(aq) -------------------> AgCl(s) +2NH4NO3(aq)

2. We have to test garden fertilizer for nitrogen, phosphorous and potassium.