Dihydrogen phosphate calcium

A great many phosphates are used in commercial fertilizers. Perhaps the most important of these is calcium dihydrogen phosphate, Ca(H2P04)2. In relatively pure form, this compound is known as triple superphosphate of lime. A 1 -2 mol mixture of Ca(H2PC>4)2 and gypsum, CaS04 2HzO, is commonly referred to as superphosphate of lime. ... 

C04-0146. The largest single use of sulfuric acid is for the production of phosphate fertilizers. The acid reacts with calcium phosphate in a 2 1 mole ratio to give calcium sulfate and calcium dihydrogen phosphate. The mixture is crushed and spread on fields, where the salts dissolve in rain water. (Calcium phosphate, commonly found in phosphate rock, is too insoluble to be a direct source of phosphate for plants.) (a) Write a balanced equation for the reaction of sulfuric acid with calcium phosphate, (b) How many kilograms each of sulliiric acid and calcium phosphate are required to produce 50.0 kg of the calcium sulfate-dihydrogen phosphate mixture (c) How many moles of phosphate ion will this mixture provide ... 

C21-0082. Calcium dihydrogen phosphate is a common phosphoras fertilizer that is made by treating fluoroapatite with phosphoric acid. Hydrogen fluoride is a by-product of the synthesis. Write a balanced equation for the production of this fertilizer and calculate the mass percent of phosphorus in the fertilizer. 

Write formulas for each of the following compounds (a) calcium hydrogen carbonate, (b) disodium hydrogen phosphate, (c) sodium dihydrogen phosphate, and (d) calcium dihydrogen phosphate. 

The product, Ca(H2P04)2, is more soluble than the phosphate. Sulfuric acid is produced in the largest quantity of any compound, with production that approaches 100 billion pounds annually. Approximately two-thirds of this amount is used in the production of fertilizers. The mixture containing calcium dihydrogen phosphate and calcium sulfate (gypsum) is known as superphosphate of lime, and it contains a higher percent of phosphorus than does calcium phosphate. 

MW 234.06 readily forms monohydrate, Ca(H2P04)2 H2O Synonyms monocalcium orthophosphate calcium biphosphate primary calcium phospate, calcium dihydrogen phosphate. 

Reaction with calcium triphosphate fluoride yields calcium dihydrogen phosphate, a component of superphosphate fertilizer ... 

Tricalcium Phosphate. CarlPOjij. white solid, insoluble in water, reactive with silicon oxide and carbon ai eleciric furnace temperaiure yielding phosphorus vapor reactive with H1SO4 to form, according tn the proportions used, phosphoric acid, or dicalcium hydrogen phosphate, CaHPOa, white solid, insoluble or calcium dihydrogen phosphate, Cal 1L POrb- H O. white solid, soluble. pK,p = 28.70. See also Apatite. 

The resulting mixture of calcium dihydrogen phosphate and calcium sulfate is sold as superphosphate fertilizer. It is of interest to note that the production of calcium sulfate is avoided by using phosphoric acid rather than sulfuric ... 

Similar to calcium dihydrogen phosphate, one may use magnesium dihydrogen phosphate (Mg(H2P04)2-H20) as an acid phosphate [5]. Not many commercial applications of this product have been identified and hence its commercial availability has been limited. As a result, though this product can produce excellent ceramics, it can only be used in specialty products such as dental cements. Formation of magnesium phosphate ceramics with this acid phosphate is discussed in Chapter 9 and its use in dental cement in Chapter 18. 

The product sodium potassium tartrate, NaKC4H403, has the common name Rochelle salt. Baking powders are also made with calcium dihydrogen phosphate, Ca(H2P04)2, sodium dihydrogen phosphate... 

Calcium phosphate, Ca3(P04)2, occurs in large deposits in nature (phosphate rock). It is converted into calcium dihydrogen phosphate, Ca(H2P04)2, and is used as a fertilizer. 

Enough water is added to convert the calcium sulfate to its dihydrate, gypsum, and the mixture of gypsum and calcium dihydrogen phosphate is sold as superphosphate of lime. Sometimes the phosphate rock is treated with phosphoric acid ... 

BeH2 beryllium hydride 7787-52-2 25.00 0.6500 1 742 CaH609P2 calcium dihydrogen phosphate monohydrate 10031-30-8 25.00 2.2200 1... 

Fertilizers have potassium, nitrogen, and phosphorus in a form that dissolves easily in water so that plants can absorb them. The potassium in fertilizer is in an ionic compound called potassium carbonate. Two ionic compounds in the fertilizer contain the nitrogen—ammonium nitrate and ammonium sulfate. The phosphorus supplied is in another ionic compound, calcium dihydrogen phosphate. 

Ca(H2P04)2 - monocalcium phosphate (calcium dihydrogen phosphate) and... 

A more soluble form of phosphate (Ca(H2P04)2), variously called superphosphate (of lime), monocalcium phosphate, or calcium dihydrogen phosphate, is made by the acidulation of phosphate rock with about 65% sulfuric acid (Eq. 11.61). 

Another option to contribute phosphate to a fertilizer formulation is to use phosphoric instead of sulfuric acid for initial acidulation of phosphate rock. In this way the only solid product of acidulation is the soluble calcium dihydrogen phosphate free of gypsum diluent product with about three times the available P2O5 of superphosphate (Eq. 11.64). 

Bones and teeth dissolve in acid. The insoluble calcium monophosphate salt, from which hydroxyapatite is made, is converted to the more soluble calcium dihydrogen phosphate salt in an environment whose pH is less than 6.2 (Sect. 9.1.1). The severity of caries was related to the pH produced in dental biofilms (plaques) after ingesting sucrose and other sugars by Richard M Stephan. The pH response he identified is referred to as Stephan Curve. He found that the starting pH, the extent of its drop, and the time for recovery to the starting pH were all related to caries severity. The pH drop was later associated with lactic acid production due to bacterial carbohydrate fermentation (saccharolytic fermentation, Sect. 1.3.2). The subsequent rise in pH was due to the production of ammonia by bacterial... 

The label on a container of double-acting baking powder tells us that it contains cornstarch, bicarbonate of soda (also called sodium hydrogen carbonate, NaHC03), sodium aluminum sulfate, and acid phosphate of calcium (which chemists call calcium dihydrogen phosphate, Ca(H2P04)2). Classify each of the following as a pure substance or a mixture. If it is a pure substance, is it an element or a compound ... 

Calcium dihydrogen phosphate, which is used in the production of triple superphosphate fertilizers, can be formed from the reaction of apatite, Ca5(P04)3F, with phosphoric acid. How many grams of calcium dihydrogen phosphate can be formed from 6.78 g of Ca5(P04)3F ... 

Phosphorus fertilizers are derived from phosphate rock, called fluorapatite, CailPOzjsF. Fluorapatite is insoluble in water, so it must first be converted to water-soluble calcium dihydrogen phosphate [Ca(H2P04)2] ... 

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