Nitrates

salts of nitric acid, HNO₃. Colorless crystalline compounds that are stable at ordinary temperatures; at high temperatures they release oxygen readily and are strong oxidizing agents (for example, 2KNO₃ = 2KNO₂ + O₂). All nitrates are highly soluble in water.

Nitrates are produced by the action of nitric acid on metals, metal oxides, and certain salts in neutral or slightly acidic solutions by exchange reactions or by the action of NO₂ on bases (nitrites are also produced by the latter reaction). The nitrates of a number of elements (sodium, potassium, and calcium) occur naturally. Of these, only deposits of sodium nitrate (Chile saltpeter) are of practical importance.

Nitrates are widely used as fertilizers (sodium, potassium, ammonium, and calcium salts), in the production of explosives (ammonium and barium salts), and as mordants in dyeing (chromium, iron, aluminum, and copper salts). Ammonium nitrates and the nitrates of the alkali and alkaline-earth metals are also called saltpeters.

nitrates

A family of chemically stable forms of inorganic nitrogen, which are formed as part of the natural breakdown of organic matter. Nitrates are ingested in vegetables and absorbed from the gastrointestinal tract; an estimated 25% of absorbed nitrates are released into the saliva, 20% of which are converted into nitrites. Nitrates are manufactured for use as fertilisers and explosives and tend to accumulate in the environment, as the uptake of nitrates by plants is relatively slow.

单词	nitrates
释义	DictionarySeenitrate Nitrates Nitrates salts of nitric acid, HNO₃. Colorless crystalline compounds that are stable at ordinary temperatures; at high temperatures they release oxygen readily and are strong oxidizing agents (for example, 2KNO₃ = 2KNO₂ + O₂). All nitrates are highly soluble in water. Nitrates are produced by the action of nitric acid on metals, metal oxides, and certain salts in neutral or slightly acidic solutions by exchange reactions or by the action of NO₂ on bases (nitrites are also produced by the latter reaction). The nitrates of a number of elements (sodium, potassium, and calcium) occur naturally. Of these, only deposits of sodium nitrate (Chile saltpeter) are of practical importance. Nitrates are widely used as fertilizers (sodium, potassium, ammonium, and calcium salts), in the production of explosives (ammonium and barium salts), and as mordants in dyeing (chromium, iron, aluminum, and copper salts). Ammonium nitrates and the nitrates of the alkali and alkaline-earth metals are also called saltpeters. nitrates nitrates A family of chemically stable forms of inorganic nitrogen, which are formed as part of the natural breakdown of organic matter. Nitrates are ingested in vegetables and absorbed from the gastrointestinal tract; an estimated 25% of absorbed nitrates are released into the saliva, 20% of which are converted into nitrites. Nitrates are manufactured for use as fertilisers and explosives and tend to accumulate in the environment, as the uptake of nitrates by plants is relatively slow.
随便看	have the legs of someone have the legs of them have the legs of us have the legs of you have the luck of the devil have the makings of have the makings of (something) have the makings of something have the measure have the measure of have the measure of her have the measure of him have the measure of it have the measure of me have the measure of one have the measure of somebody have the measure of someone have the measure of (someone or something) have the measure of them have the measure of us have the measure of you have the midas touch have the mouth of a sailor have themselves have the mulligrubs