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Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula H 3 P O 4. It is commonly encountered as an 85% aqueous solution , which is a colourless, odourless, and non- volatile syrupy liquid.
Example of phosphoric acid production. Wet-process phosphoric acid is prepared by adding sulfuric acid (H 2 SO 4) to apatite or tricalcium phosphate rock resulting in the following reaction: 3 H 2 SO 4 + Ca 3 (PO 4) 2 + 6 H 2 O ↔ 2 H 3 PO 4 + 3 CaSO 4 •2H 2 O Wet-process acid has to be purified by removing fluorine and other undesirable ...
Since the ends are condensed, its formula has one less H 2 O (water) than tripolyphosphoric acid. The general formula of a phosphoric acid is H n−2x+2 P n O 3n−x+1, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure; that is, the minimum number of bonds that would have to be ...
For each ton of phosphoric acid produced by the processing of phosphate rock, five tons of waste are generated. This waste takes the form of impure, useless, radioactive solid called phosphogypsum. Somewhere between 100,000,000 and 280,000,000 tons of phosphogypsum waste is estimated to be produced annually worldwide. [17]
Phosphoric acid made from elemental phosphorus is used in food applications such as soft drinks, and as a starting point for food grade phosphates. [116] These include monocalcium phosphate for baking powder and sodium tripolyphosphate. [116] Phosphates are used to improve the characteristics of processed meat and cheese, and in toothpaste. [116]
Lactic acid: Found in various milk or fermented products and give them a rich tartness. C 3 H 6 O 3: 3.86 Malic acid: Found in apples and rhubarb and gives them their sour/tart taste. C 4 H 6 O 5: 3.03 Phosphoric acid: Used in some cola drinks to give an acidic taste. H 3 PO 4: 2.14 Tartaric acid: Found in grapes and wines and gives them a tart ...
Plus, many sodas are acidic themselves (partially because of the phosphoric acid they contain), which can further erode your tooth enamel, the outermost protective layer of your teeth. This ...
The filtrate is composed mainly of phosphoric acid with some nitric acid and traces of calcium nitrate, and this is neutralized with ammonia to produce a compound fertilizer. Ca ( NO 3 ) 2 + 4 H 3 PO 4 + 8 NH 3 CaHPO 4 + 2 NH 4 NO 3 + 3 ( NH 4 ) 2 HPO 4 {\displaystyle {\ce {Ca(NO3)2 + 4 H3PO4 + 8 NH3 -> CaHPO4 + 2 NH4NO3 + 3(NH4)2HPO4}}}