Nitric acid is a strong acid, it dissolves in itself such metals as copper and silver, and in mix with hydrochloric acid, dissolves even gold and platinum. Generally it is applied in production of fertilizers. But there are cases that it is necessary in life, and to buy it in household shops the opportunity is not given therefore, sometimes it should be prepared independently.
It is required to you
- Sulfuric acid, nitrate of sodium, flask, torch.
Instruction
1. Fill 90 grams of nitrate of sodium (sodium saltpeter) in a glass flask. Pour there 100 grams of the concentrated sulfuric acid (it is possible to take also the diluted acid, but the sulfuric acid is stronger, the nitric will be stronger) and shake up a little.
2. Further, close a flask a cover and heat mix on a water bath, you hold temperature within 80 degrees. In process, in the closed flask there will be a gas - it is nitrogen dioxide. When nitrate of sodium completely is dissolved in sulfuric acid, turn off heating, let liquid will cool down.
3. After cooling, in a flask there will be a nitric acid with sodium sulfate impurity, these substances need to be divided. Remove a usual cover from a flask and put on her a cover with an exhaust tube. Place the second end of a tube in other flask with a cover which put in cold water. For safety, insert into a cover of the second flask still a tube and put on her a usual inflatable ball.
4. Put a flask with mix on a torch and heat mix to boiling. From the first flask acid will evaporate, leaving sodium sulfate in the rest, and in the second flask will be condensed. After the end of process, let's acid cool down, pour it in a glass container and densely close a cover.