You will need
- - ammonium nitrate;
- - potassium chloride;
- - potash;
- - water.
Prepare components for getting potassium nitrate: ammonium nitrate and potassium chloride. Take these substances in the ratio 1:1, and separately dissolve in boiling water. This should take three parts ammonium nitrate to one part water and one part potassium chloride to two parts water.
The resulting solutions mix and let it evaporate on low heat. Carry out the procedure in a well ventilated area or outdoors, because the reaction, the excreted ammonia, which has an unpleasant odor.
When in the course of the reaction will no longer stand out smoke, place the resulting solution in a refrigerator and cool until then, until the precipitate does not appear long crystals shaped like needles. The resulting crystals are the required potassium nitrate. Collect the crystals, rinse them quickly with water and dry. Nitrate ready to use.
If the opportunity to purchase potassium chloride you have, use it instead of potash. For its production you can use the ash resulting from the combustion of ordinary leaves. In this case, the purity of the nitrate will be slightly lower.
To obtain the sodium nitrate use the same method, taking potassium chloride instead of soda. The ratio of ammonium nitrate to the soda should be 1:1 if the baking soda and 6:4 if soda ash. The mixture pour warm water. After that, the reaction starts with evolution of ammonia and carbon dioxide. The solution was then heat on a water bath until gas evolution ceased, and even better – boil for two hours. Then filter the solution and evaporate. Since sodium nitrate is actively absorb moisture, it should dry more thoroughly, and store in a dry place, protected from moisture.