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Phosphoric acid

Phosphoric \Phos*phor"ic\, a. [Cf. F. phosphorique.]

  1. (Chem.) Of or pertaining to phosphorus; resembling, or containing, from us; specifically, designating those compounds in which phosphorus has a higher valence as contrasted with the phosphorous compounds.

  2. Phosphorescent. ``A phosphoric sea.'' --Byron. Glacial phosphoric acid. (Chem.)

    1. Metaphosphoric acid in the form of glassy semitransparent masses or sticks.

    2. Pure normal phosphoric acid.

      Phosphoric acid (Chem.), a white crystalline substance, H3PO4, which is the most highly oxidized acid of phosphorus, and forms an important and extensive series of compounds, viz., the phosphates.

      Soluble phosphoric acid, Insoluble phosphoric acid (Agric. Chem.), phosphoric acid combined in acid salts, or in neutral or basic salts, which are respectively soluble and insoluble in water or in plant juices.

      Reverted phosphoric acid (Agric. Chem.), phosphoric acid changed from acid (soluble) salts back to neutral or basic (insoluble) salts.

phosphoric acid

n. (context inorganic compound English) A colourless liquid, H3PO4, used in the manufacture of fertilizers, detergents and pharmaceuticals and as an additive in cola drinks.

phosphoric acid

n. an acid used in fertilizers and soaps: H3PO4 [syn: orthophosphoric acid]

Phosphoric acid

Phosphoric acid (also known as orthophosphoric acid or phosphoric(V) acid) is a mineral (inorganic) acid having the chemical formula H P O. Orthophosphoric acid refers to phosphoric acid, which is the IUPAC name for this compound. The prefix ortho is used to distinguish the acid from related phosphoric acids, called polyphosphoric acids. Orthophosphoric acid is a non- toxic acid, which, when pure, is a solid at room temperature and pressure. The conjugate base of phosphoric acid is the dihydrogen phosphate ion, , which in turn has a conjugate base of hydrogen phosphate, , which has a conjugate base of phosphate, . Phosphates are nutritious for all forms of life.

In addition to being a chemical reagent, phosphoric acid has a wide variety of uses, including as a rust inhibitor, food additive, dental and orthop(a)edic etchant, electrolyte, flux, dispersing agent, industrial etchant, fertilizer feedstock, and component of home cleaning products. Phosphoric acids and phosphates are also important in biology.

The most common source of phosphoric acid is an 85% aqueous solution; such solutions are colourless, odourless, and non- volatile. The 85% solution is a syrupy liquid, but still pourable. As a strong acid, it is corrosive. Because of the high percentage of phosphoric acid in this reagent, at least some of the orthophosphoric acid is condensed into polyphosphoric acids. For the sake of labeling and simplicity, the 85% represents HPO as if it were all orthophosphoric acid. Dilute aqueous solutions of phosphoric acid exist in the ortho- form.

Usage examples of "phosphoric acid".

The other was composed of the same amount of the silicate with six drops of dilute phosphoric acid and six grains of ammonium phosphate.

Spectrographic analysis which, given the quality of the vid on the crystal, was neither thorough nor reliable, tentatively identified the greenish fluid streamed at the cameras as an unknown compound with a dual base of hydrogen chloride and phosphoric acid.

This finally pierces the bark and roots itself firmly in the growing wood, from which it has the power of selecting and appropriating to its own use, such juices as are fitted for its sustenance: the wood of Mistletoe has been found to contain twice as much potash, and five times as much phosphoric acid as the wood of the foster tree.

Chemical analysis of this plant shows the presence of an average of 17 per cent iron, 36 per cent silicic acid and 1·65 per cent phosphoric acid.

Always' You sound like that phosphoric acid replicator you fried outside Atlanta!

It dusted all the top of the ground with crystals of phosphoric acid.

But when the Mole materialized, the phosphoric acid dissolved off the remaining thin plating of thorium from the screws.

A very weak phosphoric acid water solution is used to wash the raw bio-diesel through three stages.

A really first-rate autopsy might pick up some traces of a phosphoric acid ester—.

A really first-rate autopsy might pick up some traces of a phosphoric acid esterbut I imagine Sziller and his people will be able to prevent that easily enough.

Once of these molecules is the large spiral-shaped DNS molecule, which consists of three chemical combinations arranged next to each other: a nitrogenous organic alkali, sugar and phosphoric acid.