Phosphoric+Acid

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 * Phosphoric acid is the most common acid of phosphorus.
 * Scientific term is //orthophosphoric acid.//
 * Discovered by K.W. Scheele and J.G. Gahn in 1770 in bone ash and later learned to make it in 1777.[[image:Insecticide1.gif width="138" height="245" align="right" caption="Insecticide"]]
 * Soluble in alcohol and very soluble in water.
 * //**Molecular massmedia type="custom" key="236313" width="39" height="19"**// of 98amu
 * Has a //**molar massmedia type="custom" key="236317" width="38" height="13"**// of 98g
 * Density of 1.9 g/cmmedia type="custom" key="234523" width="26" height="26"
 * It is artificially produced.

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 * Is made up of the elements Hydrogen, Oxygen, and Phosphorus.
 * Chemical equation for phosphoric acid is media type="custom" key="236153" width="28" height="28".

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 * When in pure substance, forms colorless crystals that melt at 42.4ºC.
 * In pure substance, boils at about 260ºC
 * Creates flammable hydrogen gas when reacting with metals.

media type="custom" key="235151" width="30" height="30" //There are various ways to make phosphoric acid//
 * 1) Wet Process - Phosphoric minerals (calcium phosphate rock) are treated with sulfuric acid to form phosphoric acid.
 * 2) Thermal Process - First, phosphorus pentoxide is made by burning pure phosphorus. When phosphorus pentoxide is dissolved in water, phosphoric acid is formed.
 * 3) Red phosphorous treated with nitric acid creates a purer form of phosphoric acid.

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 * North America and North Africa are the main miners of phosphate rock which is used in the production of phosphoric acid.
 * Every year in the United States, over 10 million tons of phosphoric acid are produced.

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 * Apart from being in soft drinks, phosphoric acid is used in manufacturing fertilizer, inorganic phosphate compounds, detergents, pesticides, car polish, hair conditioner, disinfectants, dental cement, and household cleaning products.
 * About 80% of the produced phosphoric acid in the United States is used in making fertilizers
 * About 10% is used in producing detergents
 * Used in cheese, beer, jams, and jellies as a flavoring agent to give a sour flavor.
 * Salts of the acid are used in the production of baking powder and processed cheese.
 * Is used to coat metals in order to stop them from corroding.[[image:Coke.gif width="122" height="182" align="right" caption="Carbonated Beverage"]]

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 * //1. Molecular mass//** - the mass of one molecule of a certain substance
 * //2. Molar mass//** - the mass of one mole of a certain substance (6.023x10media type="custom" key="236307" width="28" height="28" molecules (Avogadro's number).

media type="custom" key="236589" width="38" height="38" http://www.npi.gov.au/database/substance-info/profiles/71.html http://environmentalchemistry.com/yogi/chemicals/cn/Phosphoric%A0acid.html http://www.worldbookonline.com/wb/Article?id=ar427740&st=phosphoric+acid http://scifun.chem.wisc.edu/CHEMWEEK/H3PO4/H3PO4.html http://www.understandingfoodadditives.org/pages/Ch2p9-1.htm http://www.cdc.gov/niosh/ipcsneng/neng1008.html http://www.questia.com/PM.qst?a=o&d=101264599