Chemistry Assignment on Tungstic Acid
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Added on 2020-05-08
Chemistry Assignment on Tungstic Acid
Added on 2020-05-08
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Running head: TUNGSTIC ACID 0TUNGSTIC ACIDName of StudentInstitution Affiliation
TUNGSTIC ACID 2Introduction A Tungstic acid is an acid from a highly grained (fined grained) which is yellow in color and contains an awfully narrow grained size distribution[ CITATION Jac10 \l 1033 ]. This acid always has a very high degree of the chemical purity of about 99 %. But this acid is highly reactive and is even morphology. Because of these distinctive nature of this acid, highly sensitive, special applications are possible areas like uniform fine chemistry, catalysis and the preparation of this tungstic metal of a given high quality and organometallic compounds of the Tungstic acid[ CITATION Ric14 \l 1033 ]. The figure below shows the powder which can be employed to manufacture or prepare the Tungstic Acid. Fig 1: Shows a powder of Tungstic employed in preparation of the Tungstic Acid (Zarina, M.2011)This Acid is also referred to as Tungstic (VI) Acid, Dihydrogen Wolframate tungsten. It has a chemical formula of H2WO4 or sometimes can be written as H2O4W. This acid always exists in a powder form and has a density of 5.5 g/mL at a temperature of the room which is 250C [CITATION GDa13 \l 1033 ]. This Acid referred to as hydrated forms of the tungstic trioxide WO3. The modest form, the monohydrate is WO3.H2O, The solid structure (powder) of WO3. H2O entail of layers of octahedrally coordinated WO5 (H2O) units which has four vertices are
TUNGSTIC ACID 3mutual or simply shared. And the dihydrate contains the same layers structure with the extra water (H2O) molecule inserted in between the layers[CITATION Hea15 \l 1033 ]. The monohydrate is a yellow powder too but it is not soluble in water. This acid can be classically referred to as `` Acid of Wolfram. `` This acid has a molecular mass of 249.85 g/mol, it is not soluble in water but highly soluble in ammonia and slightly soluble in ethanol. It has a density of 5.59g/cm3, it has a melting point of 1000C and boiling point of 14730C. Tungstic acid has a hydrogen Bond Donor of the count of four and a hydrogen Bond Accept Count of two[ CITATION Geo152 \l 1033 ]. This is a weak acid and its pH value ranges between 4 to 5, and it has a molecular formula structure as below;Fig 2: Showing a molecular structure of Tungstic Acid [ CITATION Vin12 \l 1033 ] To guarantee a justifiable amount of the raw material of this acid, a secondary source can also be employed as a secondary material[ CITATION Vin12 \l 1033 ]. In a highly erudite recycling process, a new highly pure tungstic acid yields from the materials which were used. There is alsoa chance for recycling the products which can be done by either reprocessing tungstic products or by buying recycled materials. Tungstic Acid is a highly vague word used to refers to several solid prepared from the W (VI) solution with very strong Acids. Notwithstanding an extensive literature, there is obvious
TUNGSTIC ACID 4uncertainty as to the identity and chemical nature of this substance[ CITATION Mar10 \l 1033 ]. The two compound H2WO4. H2O and H2WO4 have been categorized by x- rays diffraction and designated as acids and a similar precipitation can be identified as WO3. A third substance WO3/H2W2O7 can be got using H2WO4 with an alkaline solution. Limiting condition can be set for precipitation of a given compound are not determined and also the designation of the acid can be based on the thermal stability. For the soluble W(Vi) negative charges, it only the negative charges of Metangustate is adequately steady at a pH which is very low hence can be isolated as a free acid[ CITATION Zha17 \l 1033 ]. The acid reactions of the precipitation of tungstic acid can hence be observed as a superficial occurrence. Preparation of the Tungstic Acid This acid can be obtained through the action of a strong acid on solutions of metallic tungstate, this acid can also be prepared from the reaction which occurs between Sodium tungstate and hydrogen carbonate[ CITATION Ohi12 \l 1033 ]. Tungstic Acid can be obtained also from a pure tungstic through a reaction between this tungstic and hydrogen peroxide. This acid is one of the simplest one to prepare since it is only prepared in the simple three ways as seen above. Uses Tungstic Acid is majorly employed as a dye in so many textile industries and it can as well be used as a mordant. Properties of the Tungstic acid The properties of Tungstic Acid can be discussed under three basic properties, these can be in
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