The calcium nitrate known also as calcic saltpeter, is widely applied in various fields of industrial production and also in agriculture as nitrogen fertilizer. Its production is conducted commercially and on the industrial equipment. However, it is possible to receive nitrate of calcium and in house conditions.
It is required to you
- Nitric acid. Calcium carbonate. Glass retort. Ware for evaporation of hydrochloric solution. Gas burner or spirit-lamp.
Instruction
1. Place a small amount of nitric acid in a retort. Acid should not be concentrated. If you have only a concentrated nitric acid, dilute it. At constant stirring pour in it a squirt in water. Control solution temperature.
2. Prepare a calcium carbonate. Take chalk or limestone and crush it. Crushing can be not really qualitative.
3. Carry out reaction of clearing of nitric acid with a carbonate of calcium. In the small portions pour a calcium carbonate into solution of nitric acid. Rather large amount of gas will be distinguished. Be careful. After addition of each dose of a carbonate of calcium wait for full passing of reaction and stir slowly solution. In the presence in solution of not reacting firm rest of a carbonate of calcium, stop its further addition. In a retort calcium nitrate solution was formed.
4. Separate calcium nitrate solution from not dissolved calcium carbonate rest. Filter the received solution, or accurately merge a part of solution in suitable ware.
5. Vyparte calcium nitrate solution. Place solution in ware for evaporation. Place ware over a spirit-lamp or the gas burner. Evaporate solution on slow fire before receiving crystal nitrate of calcium.