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Topic: Copper(I) oxide

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Copper(II) oxide

Copper oxide

Copper(I) chloride

Oxide

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Copper(II) carbonate

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	Copper(I) oxide - Wikipedia, the free encyclopedia
		Copper(I) oxide or cuprous oxide (Cu O) is an oxide of copper.
		Copper(I) oxide is found as the mineral cuprite in some red-colored rocks.
		Copper(I) oxide was the first substance known to behave as a semiconductor.
	en.wikipedia.org /wiki/Copper(I)_oxide (532 words)

	COPPER - LoveToKnow Article on COPPER
		Ores.The principal ores of copper are the oxides cuprite and melaconite, the carbonates malachite and chessylite, the basic chloride atacamite, the silicate chrysocolla, the suiphides chalcocite, chalcopyrite, erubescite and tetrahedrite.
		The sulphate, oxide or chlorides, which are obtained from the suiphuretted ores, are lixiviated and the metal precipitated in the same manner as we have previously described.
		Cuprous oxide is reduced by hydrogen, carbon monoxide, charcoal, or iron, to the metal; it dissolves in hydrochloric acid forming cuprous chloride, and in other mineral acids to form cupric salts, with the separation of copper.
	www.1911encyclopedia.org /C/CO/COPPER.htm (11237 words)

	Todini and Co s.p.a. \| Copper Oxide
		Copper oxide is fundamentally used in agriculture as a fungicide, in ceramics, glass and enamel factories.
		Copper oxide is used in agriculture as a fungicide, in ceramics, glass and enamel factories.
		Copper oxide is harmful, if swallowed; do not inhale the powder; irritating to the skin on prolonged contact with signs of allergic dermatitis and is also irritating to eyes with reversible conjunctivitis.
	www.todiniandco.com /products/copper/copper_oxide.html (262 words)

	Europium Oxide - Oxide (Site not responding. Last check: 2007-11-05)
		Nitrogen oxides emitted by the soil are much greater than expected and could play a substantially larger role in seasonal air pollution than previously believed.Everything that doesn't cause cancer, pollutes.
		These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding, and where erosion begins.
		Nitric oxide, the same chemical that helps men achieve an erection, may also help women preserve their fertility and improve their chances of having a healthy baby by fighting the effects of aging on their ovaries.
	europiumoxide.impioxide.com (1456 words)

	Method for preparing polyphenylene oxide with copper (I) complex catalysts - Patent 4587327
		Methods for preparing copper(I)-diamine-phenoxide complexes within solution, such as the polymerization medium of polyphenylene oxides, are described which utilize a copper-diamine-halide complex, an alkali metal hydroxide and a monohydroxy aromatic compound to generate effective catalysts without the scrupulous exclusion of moisture and air.
		The preferred polyphenylene oxides that are prepared by the process of this invention are those wherein R.sup.5 and R.sup.6 are independently selected from hydrogen and methyl.
		Since the polyphenylene oxides in which R.sup.5 and R.sup.6 are other than methyl generally have no more desirable properties than those in which they are both methyl, and since 2,6-xylenol provides a reactive complex, is the most readily available and cheapest 2,6-dialkylphenol, its use is preferred.
	www.freepatentsonline.com /4587327.html (3267 words)

	Oxide (Site not responding. Last check: 2007-11-05)
		Oxides are extremely common in Earth's crust, and indeed in solid matter throughout the universe.
		Oxides can be named by how many oxygen atoms are in the molecule, dioxide for 2, trioxide for 3, tetroxide for 4, pentoxide for 5, hexoxide for 6, and heptoxide for 7.
		Oxides that also contain a metal atom are basic anhydrides.
	www.worldhistory.com /wiki/O/Oxide.htm (270 words)

	Encyclopedia: Copper(II) oxide
		Copper(II) oxide or cupric oxide (CuO) is the higher oxide of copper.
		An oxide is a chemical compound of oxygen with other chemical elements.
		â’ CuO + CO Copper(II) oxide is a basic oxide, so it dissolves in mineral acids such as hydrochloric acid, sulfuric acid or nitric acid to give the corresponding copper(II) salts, e.g.
	www.nationmaster.com /encyclopedia/Copper%28II%29-oxide (517 words)

	COPPER
		Copper is mainly found in the form of a fl ore, copper oxide, or a brassy-coloured ore, copper sulphide.
		The ore is copper oxide, a compound of copper and oxygen.
		The copper oxide continues to be reduced, andthe oxygen combines with the carbon monoxide to form carbon dioxide.
	www.atlanticeurope.com /Elements/Copper.html (1308 words)

	COPPER DEFICIENCY IN DAIRY GOATS
		Copper oxide needles are brittle rods (1 to 8 mm long, and 0.5+/- 0.1mm in diameter) made by oxidizing fine copper wire.
		Copper oxide particles, released in the rumen pass through to the abomasum where they remain in the folds of the abomasum.
		While the use of cupric oxide rods has been shown to produce significant anthelmintic effects, their efficacy may be reduced by a heavy abomasal parasite burden.
	www.saanendoah.com /copper1.html (5391 words)

	Copper oxide (Site not responding. Last check: 2007-11-05)
		Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board.
		Cuprous oxide is generally reddish in color and tends to form first.
		Copper carbonate is a reaction to copper oxide, not to copper, so it will only form on top of the brown or red copper oxides.
	www.smtnet.com /Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=6334& (724 words)

	Innovations: Cu Antifoulant Coating Sep00
		In addition to standard copper oxide products of the sort that yield the traditional brown or red color, copper (I) oxide products are also available that enables the paint to be pigmented to other colors.
		Upon reaction with the sodium ion in seawater, the polymer hydrolyzes and the copper acrylate is converted to copper carbonate.
		This, together with copper (I) oxide pigment and organic booster biocides contained in the formulation, provides the antifouling protection for the required five-year life of the coating, a claim that is borne out in the operating experience of more than 1000 operating vessels.
	www.copper.org /innovations/2000/09/antifoulant_story.html (2403 words)

	Reduction of Copper(II) Oxide (Site not responding. Last check: 2007-11-05)
		Black copper oxide is reduced to form copper metal (with its characteristic appearance) using methane gas.
		Add about 1 gram copper (II) oxide with a metal scoop so that as little as possible of the powder gets on the side of the test tube.
		When the reaction is complete, remove the burner, and allow the reaction test tube to cool while the gas burns in the Bunsen burner.
	www.cci.unl.edu /Chemistry/DoChem/DoChem020.html (1092 words)

	Copper Oxide Boluses for Grazing Cattle
		At the start of the trial, cows assigned to the treated group received two boluses (20 g of copper oxide needles), and their calves received one (10 g of copper oxide needles).
		The effect of treatment on the copper status of the cows was determined by liver biopsy collections at the start and end of the study (106 and 154 d for Herd one and two, respectively).
		One explanation for the negative impact of copper oxide bolus administration on calf gain is the potential antimicrobial effect of copper in the rumen.
	edis.ifas.ufl.edu /AN111 (864 words)

	Fluorinated copper salts as catalysts for the synthesis of trialkoxysilanes - US Patent 6410771 (Site not responding. Last check: 2007-11-05)
		In terms of the conversion of silicon metal and the selectivity to the trialkoxysilane relative to the tetraalkoxysilane formed as by-product, copper(I) chloride has been found to be a particularly suitable catalyst.
		Copper(I) chloride gave the highest silicon conversions (88%) and selectivities to trimethoxysilane relative to tetramethoxysilane (98%).
		The hydrochloric acid formed when using copper(I) chloride as catalyst can, when methanol is used as alcohol, react with the methanol to form methyl chloride and water, so that methanol is lost as starting material for the trialkoxysilane synthesis.
	www.patentstorm.us /patents/6410771.html (3043 words)

	Copper oxide - Wikipedia, the free encyclopedia
		Copper forms two oxides, copper(I) oxide (cuprous oxide, Cu O) a red powder and copper(II) oxide (cupric oxide, CuO) a fl powder.
		O has some scientific uses, including use as a superconductor.
		The mineral cuprite, a red colored crystal, is copper(I) oxide.
	en.wikipedia.org /wiki/Copper_oxide (132 words)

	CERAC Coating Material News : Volume 13 - Issue 3
		Cuprous oxide (Cu2O) is a semi-conductor which shows a varying optical behavior because of stoichiometric deviations arising from it’s preparation methods and parameters [1].
		However as shown in figure 4 a decrease in the forward power results in a corresponding improvement in optical transparency, and this was typical for all oxygen flow rates investigated.
		The hydrophobic nature of the surface of the copper oxide films is a good indicator of the potential to use the films for the earlier identified functional applications and other applications in a high humidity environment.
	www.cerac.com /pubs/cmn/Cmn13_4.HTM (896 words)

	clayart - thread 'copper oxide question' (Site not responding. Last check: 2007-11-05)
		oxide should be used for reduced copper glazes.
		The cuprous oxide is in the" reduced "or lower
		fl copper oxide, is the same as the amount of copper in 58 grams of red
	www.potters.org /subject27599.htm (665 words)

	Electrochromism in copper oxide thin films
		Transparent thin films of copper(I) oxide prepared on conductive SnO2:F glass substrates by anodic oxidation of sputtered copper films or by direct electrodeposition of Cu2O transformed reversibly to opaque metallic copper films when reduced in alkaline electrolyte.
		Switching between the two copper oxides (which have similar volumes) was more stable and more efficient (CE = 60 cm2/C), but covered a smaller transmittance range (60 percent to 44 percent T).
		Due to their large electrochemical storage capacity and tolerance for alkaline electrolytes, these cathodically coloring films may be useful as counter electrodes for anodically coloring electrode films such as nickel oxide or metal hydrides.
	repositories.cdlib.org /lbnl/LBNL-46510 (228 words)

	Dig the Bible - The Restoration and Conservation of Ancient Copper Coins
		A thin layer of copper on the coin oxidizes to form a consistent and nonconcealing layer of copper (I) oxide (cuprite) called a patina.
		Plenderleith and Werner note, "Contamination is the rule rather than the exception because soluble salts are widely distributed in nature, in the soil as well as in the sea, and for this reason they are usually present in excavated material" (246).
		The coin was left with mostly fl and dark red material (cuprous oxide) on it, which was not noticeable before treatment.
	www.digbible.org /restoration.html (3163 words)

	Re: Effect of salt and vinegar to tarnish on pennies
		The surface of the penny is likely coated with copper II oxide (other names are: cupric oxide or copper oxide fl, CuO, has a brownish fl color) or copper I oxide (other name is: cuprous oxide, Cu2O, has a reddish brown color).
		These oxides are soluble in acids and so may be dissolved by the vinegar (5% acetic acid solution).
		The copper I oxide is insoluble in water.
	www.madsci.org /posts/archives/dec97/877613842.Ch.r.html (250 words)

	copper
		Copper(I) chemistry is limited by a reaction which occurs involving simple copper(I) ions in solution.
		The copper(I) iodide is virtually insoluble in water, and so the disproportionation reaction doesn't happen.
		Forming copper(I) complexes (other than the one with water as a ligand) also stabalises the copper(I) oxidation state.
	www.chemguide.co.uk /inorganic/transition/copper.html (1165 words)

	Ceramics Today - Articles
		Metallic copper is fairly resistant to corrosion and is not attacked by dry air, water, or nonoxidizing acid.
		Copper I oxide (Cu2O) occurs naturally as the reddish mineral cuprite.
		Copper II oxide is fl and is obtained by heating copper metal in air.
	www.ceramicstoday.com /articles/copper_english.htm (2385 words)

	Copper Naphthenate Report 17 Part 4 (Site not responding. Last check: 2007-11-05)
		The fl copper oxide can then form a "seed" that allows the resulting emulsion to either grow in size or precipitate to the bottom of the tank, since copper oxide is not soluble inorganic solvents.
		This copper oxide increases the amount of xylene insolubles, or sludge, present in the solution.
		Again, the secret to keeping sludge from forming in copper naphthenate treating equipment is to reduce the water content appreciably, continuously filter the solution, and prevent debris and trash from entering the wood treating equipment.
	www.merichem.com /COPPER/CuNapRpt17-3.htm (1531 words)

	JCE 2002 (79) 994 [Aug] Determination of the Empirical Formula of a Copper Oxide Salt Using Two Different Methods
		In this experiment, students convert a copper oxide salt to copper metal by two chemical methods, one using methane gas in the solid state and one using aluminum metal in an aqueous solution.
		Students determine the mass of copper metal produced from a given amount of copper oxide and plot this data for the entire class for each chemical method.
		The slope of these plots provides a measure of the mass fraction of the copper oxide salt that is copper, and the empirical formula of the salt is determined for each chemical method using the slope.
	jchemed.chem.wisc.edu /Journal/Issues/2002/Aug/abs994.html (304 words)

	Determination of an Empirical Formula
		Purpose: The purpose of this lab is to determine the simplest formula of an oxide of copper formed by reacting copper with nitric acid to form a copper nitrate which is then heated to form either copper(I) oxide or copper(II) oxide.
		Be very careful not to breathe in any of the fumes that are given off during the heating process.
		Your calculations should show how many moles of Cu reacted (which ideally should be the number of moles of Cu in the final product) and how many moles of oxygen atoms are in the final product.
	www.chemistrylecturenotes.com /Empirical_Formula_Lab.htm (481 words)

	Copper
		Apparently the reason that policemen in he USA are nicknamed "cops" or "coppers" is to do with their uniforms which used to have copper buttons.
		The most important compounds are the oxide and the sulfate, (blue vitriol).
		Complex procedures are used initially to change the ore into a form of copper sulfide appropriate for final reduction via a copper(I) oxide.
	www.elmhurst.edu /~chm/vchembook/102copper.html (195 words)

	Reduction of Copper Oxide by Hydrogen (Site not responding. Last check: 2007-11-05)
		Description: A piece of copper is heated in a flame until it is coated with fl copper oxide.
		While still hot, the copper is bathed in hydrogen gas, and the original coppery color returns.
		The reaction may be repeated as long as the copper object is very hot.
	genchem.chem.wisc.edu /demonstrations/Gen_Chem_Pages/04chemrxnpage/reduction_of_copper_oxide_.htm (61 words)

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