During World War I the newly industrialized Haber process was combined with the Ostwald process afterallowing Germany to produce nitric acid for the war after being cut off from its supplies of mineral sodium nitrates from Chile see nitratite.
Swiss method[ edit ] LeConte describes a process using only urine and not dung, referring to it as the Swiss method.
LeConte[ edit ] Perhaps the most exhaustive discussion of the production of this material is the LeConte text. It is also used in fireworks such as smoke bombs. Play media A demonstration of the oxidation of a piece of charcoal in molten potassium nitrate. Since he was calling for the assistance of rural farming communities, the descriptions and instructions are both simple and explicit.
It is also used to soften food and reduce cooking time when boiling beans and tough meat. He details the "French Method", along with several variations, as well as a "Swiss method".
The aqueous solution is almost neutral, exhibiting pH 6. Many references have been made to a method using only straw and urine, but there is no such method in this work. When used by itself, it has an NPK rating of The terminology used by al-Rammah indicated a Chinese origin for the gunpowder weapons about which he wrote.
This reaction is highly exothermic. The Arabs called it "Chinese snow" Arabic: It is not very hygroscopicabsorbing about 0. In modern times this is reversed: Even so, saltpeter is still used in some food applications, such as charcuterie and the brine used to make corned beef.
Nitric acid production[ edit ] Historically, nitric acid was produced by combining sulfuric acid with nitrates such as saltpeter. After that time, small arms and large artillery increasingly began to depend on corditea smokeless powder.
Food preservation[ edit ] In the process of food preservationpotassium nitrate has been a common ingredient of salted meat since the Middle Ages but its use has been mostly discontinued because of inconsistent results compared to more modern nitrate and nitrite compounds.
Potassium nitrate is moderately soluble in water, but its solubility increases with temperature see infobox.
Urine is collected directly, in a sandpit under a stable. From nitric acid[ edit ] From until the World War I era, potassium nitrate for black powder and fertilizer was produced on an industrial scale from nitric acid produced using the Birkeland—Eyde processwhich used an electric arc to oxidize nitrogen from the air.
Etymology[ edit ] Potassium nitrate, because of its early and global use and production, has many names.Purpose: Find crystallization temperatures for 7 concentrations of KNO3 and make a solubility graph Materials: KNO3, test tube, stir rod, weigh boats, hot plates, thermometer, 10 mL graduated cylinder.
Procedure: In two test tubes, put exactly 5 mL water in each-Put assigned amount KNO3 in each-Heat in hot water bath until dissolved- you may stir with sitr rod. The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at 1 atmosphere pressure.
Units of solubility are given in grams per millilitres of water (g/ ml), unless shown otherwise. Philip Sawyer Mrs. Shirley Chemistry 2 1 February Title: Solubility of KNO3 Objective: The objective of the Solubility of KNO3 lab was to find the solubility of potassium nitrate with different amounts of it and the temperatures at which the potassium nitrate crystallized.
Potassium nitrate is a chemical compound with the chemical formula K N O 3. It is an ionic salt of potassium ions K + and nitrate ions NO 3 −, and is therefore an alkali metal nitrate. It Chemical formula: KNO₃. Solubility is the mass of a solute that can be dissolved in a given mass of solvent.
Solubility varies according to temperature for the same solute and solvent.
The solubility graph for potassium nitrate in water is shown below. Apr 04, · Best Answer: Rules to finding if things are soluble in water or not. 1) All compounds of Group I and ammonium ions are soluble. 2) All nitrates, acetates, and chlorates are soluble.
3)All binary compounds of the halogens (other than F) with metals are soluble, except those of Ag, Hg(I), and billsimas.com: Resolved.Download