Zinc Chloride Formula
Zinc Chloride Formula
Zinc Chloride Formula is a compound with the formula ZnCl2.
Currently, nine different crystal forms of Zinc Chloride Formula are known. These ZnCl2 hydrates are white or colorless. Both are readily soluble in water.
The reaction of metallic zinc with hydrogen chloride gas yields the anhydrous form of zinc chloride.
Zn + 2HCl → ZnCl2 + H2
Hydrochloric acid can be used instead of hydrochloric acid to treat zinc in order to obtain the hydrated form of the compound. Hydrochloric acid reacts with zinc sulfide to produce zinc chloride and hydrogen sulfide.
ZnS + 2HCl → ZnCl2 + H2S
The only oxidation state exhibited by zinc is +2, so the product is relatively easy to purify. Learners can check the formulas on the Extramarks website.
Properties Of Zinc Chloride
Physical properties of Zinc Chloride Formula
Zinc chloride is a solid at room temperature and has the appearance of white crystals and is odourless. The water solubility of this compound corresponds to 432 g/100 g. The compound is also soluble in acetone, ethanol and glycerin.
Molten zinc chloride is highly viscous and has relatively low electrical conductivity values.
Chemical Properties of Zinc Chloride Formula
When ZnCl2 is dissolved in water, the solution becomes acidic. A 6 M concentration of zinc chloride in water has a pH of 1. Examples are Zn(NH3)4Cl2 and ZnCl2(NH3)2. Upon heating, the hydrated form of zinc chloride loses water to yield a small amount of ZnCl(OH). The chemical formula for this reaction is: ZnCl2.2H2O → ZnCl(OH) + H2O + HCl
Zinc Chloride Chemical Structure
Zinc chloride ZnCl2
Molar mass 136.315 grams/mole
Density 2.907 grams/cubic centimeter
Melting point 563 K (290oC)
Boiling point 1005 K (732oC
Zinc Chloride Uses
In the molten state, this compound acts as a catalyst for several aromatization reactions. For example, hexamethylbenzene can be obtained from methanol using molten ZnCl2.
Acting as a moderately strong Lewis acid, this compound also acts as a catalyst for Fischer indole synthesis reactions and some Friedel-Crafts acylation reactions. This reagent is very useful in the production of alkyl chlorides. Smoke bombs contain a mixture of zinc oxide and hexachloroethane. When ignited, these compounds react to form Zinc Chloride Formula smoke, which acts as a smoke screen. ZnCl2 is also useful for fingerprint recognition because it forms a readily detectable complex with Luhemann violet. Aqueous solutions of this compound can be used for disinfection purposes when diluted. It is an ingredient in some antiseptic mouthwash products.
