Respuesta :
Reduction of a metal halide by hydrogen to form a metal, Complete chemical equation - PdCl₂(aq) + H₂(g) → Pd + 2HCl
Metal halides are compounds made of metals and halogens. Some are ionic, like sodium chloride, while others are covalent. Some metal halides are discrete molecules such as uranium hexafluoride, but most employ polymeric structures such as palladium chloride.
There are four main methods for reducing metal halides to metals: metallothermal reduction, hydrogen reduction, pyrolysis, and electrolysis.
Reduction of metal halides with hydrogen is another route to metals. Tungsten hexachloride carried in an argon carrier gas can be reacted with hydrogen in a two-zone furnace to produce tungsten powder of specified size. Process variables include gas composition, hydrogen flow rate, and reaction temperature. Iron powder was obtained by similarly reducing solid ferric chloride with hydrogen.
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