Search results
Results from the WOW.Com Content Network
The term phosphate is also used in organic chemistry for the functional groups that result when one or more of the hydrogens are replaced by bonds to other groups. These acids, together with their salts and esters , include some of the best-known compounds of phosphorus, of high importance in biochemistry , mineralogy , agriculture , pharmacy ...
At pH 1 or lower, the phosphoric acid is practically undissociated. Around pH 4.7 (mid-way between the first two pK a values) the dihydrogen phosphate ion, [H 2 PO 4] −, is practically the only species present. Around pH 9.8 (mid-way between the second and third pK a values) the monohydrogen phosphate ion, [HPO 4] 2−, is the only species ...
A phosphate phosphite is a chemical compound or salt that contains phosphate and phosphite anions (PO 3 3-and PO 4 3-). These are mixed anion compounds or mixed valence compounds. Some have third anions. Phosphate phosphites frequently occur as metal organic framework (MOF) compounds which are of research interest for gas storage, detection or ...
Butylphenyl diphenyl phosphate and propylphenyl diphenyl phosphate became available after 1960. [ 79 ] In addition to their use as hydraulic base-stock, organophosphates (tricresyl phosphate) and metal organothiophosphates ( zinc dithiophosphate ) are used as both an antiwear additives and extreme pressure additives in lubricants , where they ...
You probably mean phosphates. There is a big difference between phosphorus (P), phosphorous (HPO 3 2-), and phosphate (PO 4 3-). See phosphate and eutrophication for the details, but in a nutshell, algae consume phosphates and oxygen to produce energy. If large amounts of phosphates are introduced into a body of water, the algae population ...
Low phosphate levels are an important limit to growth in a number of plant ecosystems. The vast majority of phosphorus compounds mined are consumed as fertilisers. Phosphate is needed to replace the phosphorus that plants remove from the soil, and its annual demand is rising nearly twice as fast as the growth of the human population.
The difference between successive pK a values is sufficiently large so that salts of either monohydrogen phosphate, HPO 2− 4 or dihydrogen phosphate, H 2 PO − 4, can be prepared from a solution of phosphoric acid by adjusting the pH to be mid-way between the respective pK a values.
The difference between the coordinating power of PR 3 and NR 3 reflects the greater steric crowding around the nitrogen atom, which is smaller. By changes in one or more of the three organic substituents, the steric and electronic properties of phosphine ligands can be manipulated. [ 11 ]