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www.reference.com/science/pka-values-phosphoric-acid-7b16...

The pKa for phosphoric acid is 2.15 for the first dissociation, 7.20 for the second dissociation and 12.35 for the third dissociation. These values are based on an ambient temperature of 25 degrees Celsius, and are known as Ka1, Ka2 and Ka3, respectively.

www.quora.com/What-are-the-pKa-values-for-phosphoric-acid...

Why do the pKa values for phosphoric acid differ? How is the Ka for phosphoric acid determined? What is the formula of phosphoric acid? How can you determine the molarity of phosphoric acid? What is the pKa value, of perchloric acid (HClO4)? How is an acid's strength related to its pKa value?

www2.ucdsb.on.ca/tiss/stretton/Database/polyprotic_acids.htm

K a and pK a for Polyprotic Acids. Acid Name : K a : pK a: Carbonic, H 2 CO 3 : 1 st: 4.5 x 10-7 : 6.35: 2 nd: 4.7 x 10-11: 10.33 : Hydrogen sulphide, H 2 S : 1 st: 9 ...

clas.sa.ucsb.edu/staff/Resource Folder/Chem109ABC/Acid, Base...

Table of Acids with Ka and pKa Values* CLAS Acid HA A-Ka pKa Acid Strength Conjugate Base Strength Hydroiodic HI I-Hydrobromic HBr Br-Perchloric HClO4 ClO4-Hydrochloric HCl Cl-Chloric HClO3 ClO3-Sulfuric (1) H2SO4 HSO4-Nitric HNO3 NO3-Strong acids completely dissociate in aq solution (Ka > 1, pKa < 1).

en.wikipedia.org/wiki/Phosphoric_acid

Phosphoric acid, H 3 PO 4, is a tribasic acid.The speciation diagram shows that, in aqueous solution, there are five main pH regions. There are 3 regions, centred where the pH is equal to a pK value, which are buffer regions.; In the region centred around pH 4.7 (mid-way between the first two pK values) the dihydrogen phosphate ion, [H 2 PO 4] −, is the only species present.

www.answers.com/Q/Pka_value_of_phosphoric_acid

Phosphoric acid has the formula H3PO4 so if you add up these numbers from the periodic table you find the Molar mass of phosphoric acid is 98 (1+1+1+31+16+16+16+16). this is the mass (in grams) of ...

en.wikipedia.org/wiki/Acid_dissociation_constant

According to Pauling's first rule, successive pK values of a given acid increase (pK a2 > pK a1). For oxyacids with more than one ionizable hydrogen on the same atom, the pK a values often increase by about 5 units for each proton removed, as in the example of phosphoric acid above. In the case of a diprotic acid, H 2 A, the two equilibria are

pubchem.ncbi.nlm.nih.gov/compound/Phosphoric_acid

Phosphoric acid is used in dentistry and orthodontics as an etching solution, to clean and roughen the surfaces of teeth where dental appliances or fillings will be placed. In addition, phosphoric acid is a constituent in bone and teeth, and plays a role in many metabolic processes.

www.sigmaaldrich.com/catalog/search?term=phosphoric+acid&...

Search results for phosphoric acid at Sigma-Aldrich

2012books.lardbucket.org/books/principles-of-general...

This is “Appendix C: Dissociation Constants and pKa Values for Acids at 25°C”, appendix 3 from the book Principles of General Chemistry (v. 1.0). For details on it (including licensing), click here.