Dictionary,Defintion,Meaning,What is Palladium oxide, Pearl Hardening, Palladium, Palladium hydrous oxide, Palladium ammines, Palladium chloride

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Home >> Inorganic Chemistry Dictionary >> Palladium oxide - Pearl Hardening

Your Ad Here	Palladium a chemical element, symbol Pd, atomic number 46, atomic weight 106.4. Palladium (II) hydrous oxide (PdO.nH₂O) a yellow gelatinous precipitate obtained on adding alkali hydroxide to a solution of palladous. Palladium ammines an extensive range of palladium (II) complexes; generally 4-coordinate, containing Pd-NH₂ (or amine) bonds.
Palladium chloride PdCI₂ or PdCI₂₂H₂O, dark-brown, deliquescent powder that decomposes at 501˚C; soluble in water, alcohol, acetone, and hydrochloric acid; used in medicine, analytical chemistry, photographic chemicals, and indelible inks. Also known as palladium bichloride; palladous chloride. Palladium iodide PdI2, black powder that decomposes above 100˚C soluble in potassium iodide solution, insoluble in water and alcohol. Also known as palladous iodide. Palladium nitrate Pd(NO₃)², brown, water-soluble, deliquescent salt; used as an analytical reagent. Also known as palladous nitrate.
Palladium oxide PdO, amber or black-green powder that decomposes at 750˚C; soluble in dilute acids; used in chemical synthesis as a reduction catalyst. Also known as palladium monoxide. Parahydrogen hydrogen molecules in which the spins of the two constituent nuclei are anti-parallel. Para-nitrotoluene NO₂C₆H₄CH₃, yellow crystals that melt as 51.7˚C; insoluble in water, soluble in ethanol; used to produce toluidine and to manufacture dyes. Also known as para-methylnitorbenzene.	Your Ad Here
Parting the process of separating Aufrom Ag. As the chemical properties of the elements are very different this is an easy matter and methods used in-clude dissolving the Ag in conc. H₂SO₄ or HNO₃ or the preferential reaction of Ag with CI₃ to give AgCI. Passivity a state of chemical inactivity, especially of a metal that is relatively resistant to corrosion due to loss of chemical activity. Pasteur effect yeast and other cells can break down sugar in the presence of oxygen (eventually, to CO₂ and H₂O) or in its absence (to CO₂ and ethanol). The decomposition of sugar is often greater in the absence of oxygen than in its presence, i.e., the Pasteur effect. With oxygen, less toxic products (alcohol) are produced and the breakdown is more efficient in terms of energy production.
Your Ad Here	Patina the decorative and corrosion-resistant surface given to bronze, iron, etc., as an oxide film formed on warming the metal. Pearl ash potassium carbonate, K₂CO₃, made from wood ashes. Pearl hardening commercial name for a crystallised grade of calcium sulphate; used as a paper filler.

Peat

an early stage in the formation of coal from vegetable matter. It is an accumulation of partly decomposed plant material, and is used as fuel.

Pentafluoride

a chemical compound onto which five fluoride atoms are bonded.

Pentahydrate

refers to a crystalline compound having five molecules of water of crystallisation per molecule of compound.

Perbromic acid

prepared by the oxidation of bromates with xenon difluoride. Very powerful oxidant.

Perchlorates (MCIO₄)

these are obtained by electrolytic oxidation of (CIO₃) and contain (CIO₄) ion. For example, NaCIO₄. The perchlorates are strong oxidizing agents in the order CIO₄ < BrO₄ <BrO₄ >IO₄

Periodate

a salt of periodic acid, HIO₄, for example, potassium periodate, KIO₄

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