Dies geschieht in Ihren Datenschutzeinstellungen. HCl is -4 and H2SO4 is -3 although they are so strong that the values are extrapolated from other data. This is a slightly larger group than the strong acids, but you can identify the strong bases because they are metal hydroxides. In a strong acid, the pH is lower than, generally 3. Orthophosphoric acid also forms esters, called organophosphates.[14]. There are chemical reactions which cannot be seen with naked eyes. The equilibrium equations are: The dominant use of phosphoric acid is for fertilizers, consuming approximately 90% of production. The phosphoric acid from both processes may be further purified by removing compounds of arsenic and other potentially toxic impurities. Ans: Molecular mass = 97.994 g/mol, boiling point = 158 °C and melting point = 42.35 °C. Phosphoric acid is commonly encountered in chemical laboratories as an 85% aqueous solution, which is a colourless, odourless, and non- volatile syrupy liquid. The pure compound is a colorless solid. Strong Acid vs Weak Acid. 7 Further removal of water yields superphosphoric acid with a P2O5 concentration above 70% (corresponding to nearly 100% H3PO4). pH; Strong acid . It is normally encountered as a colorless syrup of 85% concentration in water. 2 As a sanitizing agent in the dairy, food, and brewing industries. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. But if you compare it with ethanoic acid, ka 1.78 x 10 -5 , then it is much stronger. It is a corrosive liquid that can cause eye and skin burns. Molecular weight of phosphoric acid: 97.99 4). The strong bases are listed at the bottom right of the table and get weaker as we move to the top of the table. Hydrochloric Acid 4.55 M Strong Acid.658 Strong Acid Phosphoric Acid .20 M Weak Acid 1.43 Strong Acid Potassium Nitrate .35 M Salt No pH Salt Barium Hydroxide .10 M Strong Base 13 Strong Base Sodium Cyanide .0510 M Weak Base 10.96 Weak Base For other acids commonly called "phosphoric acid", see, Except where otherwise noted, data are given for materials in their, CS1 maint: multiple names: authors list (, "CAMEO Chemicals Datasheet - Phosphoric Acid", National Institute for Occupational Safety and Health, http://www.chemspider.com/Chemical-Structure.979.html, Ullmann's Encyclopedia of Industrial Chemistry, "Current EU approved additives and their E Numbers", "Dietary and pharmacologic management to prevent recurrent nephrolithiasis in adults: A clinical practice guideline from the American College of Physicians", "Colas, but not other carbonated beverages, are associated with low bone mineral density in older women: The Framingham Osteoporosis Study", National pollutant inventory – Phosphoric acid fact sheet, https://en.wikipedia.org/w/index.php?title=Phosphoric_acid&oldid=983063021, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, 40–42.4 °C (104.0–108.3 °F; 313.1–315.5 K). Any other acid is considered a weak acid. List two wide applications of phosphoric acid. Silica is also added, resulting in the production of calcium silicate slag. Nevertheless, the term "phosphoric acid" often means this specific compound; and that is the current IUPAC nomenclature. example@lookchem.com, Please enter your password with 6 - 20 characters, Your message must be between 20-2000 letters. Molar mass of phosphoric acid: 97.994 g/mol 5). 3-bromo-4-hydroxybenzaldehyde is also called Benzaldehyde, 3-bromo-4-hydroxy-. Any element from the first two columns of the periodic table combined with a hydroxide is a strong base. 5. Specific gravity of phosphoric acid: 1.685@25C (water=1) 5). [15] In the wet process a phosphate-containing mineral such as calcium hydroxyapatite is treated with sulfuric acid.[16]. Is phosphoric acid a strong acid? Phosphoric acid is produced industrially by two general routes. CAS No. Is it a strong acid? Need more detailed properties information of Phosphoric acid, you could refer to the Chemical formula of phosphoric acid: H3PO4 3). 6 Find out more about how we use your information in our Privacy Policy and Cookie Policy. . The phosphoric acid solution usually contains 23–33% P2O5 (32–46% H3PO4). There are different chemical substances which have their own characteristics. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. All three hydrogens are acidic, with dissociation constants pKa1 = 2.14, pKa2 = 7.20, and pKa3 = 12.37. 1. However, the particular chemistry of the aluminium ions released may dominate the resultant properties. Acid with values less than one are considered weak. Weak acids such as acetic acid have a pKa of 4.75. Density of phosphoric acid: 1.885 g/mL (liquid)/1.685 g/mL (85% solution)/2.030 g/mL (crystal at 25 °C) 2). [27], This article is about orthophosphoric acid. Definition and Examples, What Are the First 20 Elements - Names and Symbols, 10 Examples of Solids, Liquids, Gases, and Plasma. What is the molecular mass, boiling point and melting point of phosphoric acid? 5 As to the problem of "phosphoric acid strong or weak", we will explain it below. [17], Food-grade phosphoric acid (additive E338[18]) is used to acidify foods and beverages such as various colas and jams, providing a tangy or sour taste. Wir und unsere Partner nutzen Cookies und ähnliche Technik, um Daten auf Ihrem Gerät zu speichern und/oder darauf zuzugreifen, für folgende Zwecke: um personalisierte Werbung und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr über die Zielgruppe zu erfahren sowie für die Entwicklung von Produkten. The acidity of phosphoric acid is much weaker than sulfuric acid, hydrochloric acid, and nitric acid, while stronger than acetic acid and boric acid. 7664-38-2) is one kind of mineral (inorganic) acid. What Are Electrolytes in Chemistry? Yahoo ist Teil von Verizon Media. Although phosphoric acid does not meet the strict definition of a strong acid, the 85% solution can still severely irritate the skin and damage the eyes.
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