The experience begins with the preparation of the complex diaminado of silver [Ag(NH__3_)2]+, known as the reagent of Tolens, from silver and ammonia nitrate. Later, added glucose that acts as a reducer, which allows the formation of a thin layer of metallic silver on the surface of the test tube, which agitated so that the dissolution is in contact with the entire surface of the tube of the essay that we want to metalizar.
This is the reaction that takes place: CH2OH(CHOH)4COH + 2[Ag(NH3)2]+ + 3OH-->2Ag(s) + CH2OH(CHOH)4 COO¯ + 4NH3 + 2H2O
Department of Inorganic Chemistry
Universidad de Alicante Carretera de San Vicente del Raspeig s/n 03690 San Vicente del Raspeig Alicante (Spain)