Nitrate of silver represents the soluble average salt consisting of atom of metal and the acid rest – nitrate. Other name of nitrate of silver – the nitrate silver which is a part of a lyapis – medical means which is on sale in pharmacy and is intended for cauterization of small wounds on skin. Data on receiving salt can be useful at control and independent works, when conducting practical and laboratory trials and also during the Unified State Examination in chemistry.
It is required to you
- - support;
- - test tubes;
- - the concentrated nitric acid;
- - the diluted nitric acid;
- - silver oxide;
- - silver sulfide.
Instruction
1. The main way of receiving nitrate of silver is interaction of metal with the concentrated nitric acid. As a result, besides required salt, such substances as water and oxide nitrogen (IV) – brown gas or "a fox tail" are formed. Scheme of reaction: Silver + (konts.) nitric acid = silver nitrate + nitrogen oxide (IV) + water
2. Concentration of nitric acid needs to be considered surely as interaction of silver with the same nitric acid, but only diluted leads to formation of the same products of reaction, except for collateral connection. In this case, instead of nitrogen oxide (IV) nitrogen oxide (II) is formed. Scheme of reaction: Silver + (razb.) nitric acid = silver nitrate + nitrogen oxide (II) + water
3. In silver oxide interaction (represents substance of dark brown color) with the diluted nitric acid silver nitrate is formed. Scheme of reaction: Oxide of silver (I) + (razb.) nitric acid = silver nitrate + water