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Color enhancers (usually chlorine donors) are frequently added too, the most common of which is polyvinyl chloride. A practical use of colored fire is the flame test, where metal cations are tested by placing the sample in a flame and analyzing the color produced. [3] [4]
A flame test involves introducing a sample of the element or compound to a hot, non-luminous flame and observing the color of the flame that results. [4] The compound can be made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. [5] Different flames can be tried to verify the accuracy of ...
A pretty color when ammonium perchlorate is used as oxidizer. Green Barium nitrate: Ba(NO 3) 2: Not too strong effect. With chlorine donors yields green color, without chlorine burns white. In green compositions usually used with perchlorates. Green Barium oxalate: BaC 2 O 4: Blue Copper(I) chloride: CuCl The richest blue flame. Almost ...
Polyvinyl chloride, also serving as chlorine donor and a binder; Polyvinylidene chloride, also serving as chlorine donor; Shellac, good especially for colored flame compositions; Accroides resin , higher burning rate than shellac, burns well even with potassium perchlorate. Suitable for chrysanthemum stars.
Several of the CPK colors refer mnemonically to colors of the pure elements or notable compound. For example, hydrogen is a colorless gas, carbon as charcoal, graphite or coke is black, sulfur powder is yellow, chlorine is a greenish gas, bromine is a dark red liquid, iodine in ether is violet, amorphous phosphorus is red, rust is dark orange-red, etc.
Copper(II) chloride is used as a catalyst in a variety of processes that produce chlorine by oxychlorination. The Deacon process takes place at about 400 to 450 °C in the presence of a copper chloride: [8] 4 HCl + O 2 → 2 Cl 2 + 2 H 2 O. Copper(II) chloride catalyzes the chlorination in the production of vinyl chloride and dichloromethane. [8]