Platinum(IV) bromide
Encyclopedia
Platinum bromide is the chemical compound
composed of platinum
and bromine
with the formula
PtBr4.
A solution of platinum(IV) bromide and gold(III) bromide
in water can be used to test for the presence of caesium
by putting a drop of the reagent and a drop of the unknown solution onto a piece of filter paper
. A gray or black stain indicates a positive result; however, the mechanism for this reaction is unknown
.
Chemical compound
A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms that are held together...
composed of platinum
Platinum
Platinum is a chemical element with the chemical symbol Pt and an atomic number of 78. Its name is derived from the Spanish term platina del Pinto, which is literally translated into "little silver of the Pinto River." It is a dense, malleable, ductile, precious, gray-white transition metal...
and bromine
Bromine
Bromine ") is a chemical element with the symbol Br, an atomic number of 35, and an atomic mass of 79.904. It is in the halogen element group. The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826...
with the formula
Chemical formula
A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound....
PtBr4.
A solution of platinum(IV) bromide and gold(III) bromide
Gold(III) bromide
Gold bromide is a dark-red to black crystalline solid. It has the empirical formula AuBr3, but exists primarily as a dimer with the molecular formula Au2Br6 in which two gold atoms are bridged by two bromine atoms. It is commonly referred to as gold bromide, gold tribromide, and rarely but...
in water can be used to test for the presence of caesium
Caesium
Caesium or cesium is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C , which makes it one of only five elemental metals that are liquid at room temperature...
by putting a drop of the reagent and a drop of the unknown solution onto a piece of filter paper
Filter paper
Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or air.-Properties:Filter paper comes in various porosities and grades depending on the applications it is meant for...
. A gray or black stain indicates a positive result; however, the mechanism for this reaction is unknown
.