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Topic: Copper(I) iodide

	Copper(I) iodide - Wikipedia, the free encyclopedia
		Copper(I) iodide, an off white, air stable powder, is found in nature as mineral marshite, a redish brown crystal.
		Copper(I) iodide is nonmolecular with a zinc blend structure below 420 °C (ɣ-CuI), a wurtzite structure between 390 and 440 °C (β-CuI), and a cubic structure above 440 °C (α-CuI).
		Copper(I) bromide and copper(I) chloride transform from zinc blend structure to wurtzite structure at 405 and 435 °C respectively.
	en.wikipedia.org /wiki/Copper(I)_iodide (507 words)

	Copper(I) chloride - Wikipedia, the free encyclopedia
		Copper(I) chloride (quite commonly called cuprous chloride), is the lower chloride of copper, with the formula CuCl.
		Copper(I) chloride is a Lewis acid, classified as soft according to the Hard-Soft Acid-Base concept.
		Copper(I) chloride is also an intermediate formed from copper(II) chloride in the Wacker process.
	en.wikipedia.org /wiki/Copper(I)_chloride (725 words)

	Iodine - Wikipedia, the free encyclopedia
		Potassium iodide (KI) tablets or liquid drops can be given to people in a nuclear disaster area when fission has taken place, to flush out the radioactive iodine-131 fission product.
		Tungsten iodide is used to stabilize the filaments in light bulbs.
		I is the radioisotope most often used in nuclear imaging of the thyroid and for thyroid uptake scans (used for the evaluation of Grave's disease).
	en.wikipedia.org /wiki/Iodine (1415 words)

	Copper Iodide
		As well as by direct combination of the elements on heating, copper iodide may also be prepared by immersing a strip of copper into a solution containing iodine.
		In the case of the direct synthesis of copper iodide by heating the elements, then, within a double period a student should be able to produce a series of results.
		On the worksheet Copper Iodide 1, pupils are asked questions about the shapes of the plots and to look for patterns in the masses of copper, iodine and copper iodide.
	website.lineone.net /~aberdareco/PAGES/ChemTG/Chemhtml/cui.htm (1632 words)

	Finding the Formula of Copper Iodide (Site not responding. Last check: 2007-10-08)
		The yellow copper iodide is now gently scraped from the copper surface and the copper strip again reweighed.
		Not all of the copper iodide might be scraped from the copper strip.
		Some copper, as well as copper iodide, might be scraped from the strip.
	www.avogadro.co.uk /calculations/cui.htm (364 words)

	COPPER - LoveToKnow Article on COPPER (Site not responding. Last check: 2007-10-08)
		Cuprous iodide, Cu, If, is obtained as a white powder, which suffers little alteration on exposure, by the direct union of its components or by mixing solutions of cuprous chloride in hydrochloric acid and potassium iodide; or, with liberation of iodine, by adding potassium iodide to a cupric salt.
		Cupric iodide is only known in combination, as in Cub, 4NH3, H2O, which is obtained by exposing Cuflf,4NH3 to moist air.
		Cuprous suiphide, Cu2S, occurs in nature as the mineral chalcocite or copper-glance (g.e.), and may be obtained as a fl brittle mass by the direct combination of its constituents.
	39.1911encyclopedia.org /C/CO/COPPER.htm (11237 words)

	Allyl/Alkyl-Benzenes from PhMgBr, CuI and Allyl/Alkyl Halides - [www.rhodium.ws] (Site not responding. Last check: 2007-10-08)
		The yield of diphenylmethane is 84% in the presence and 52% in the absence of nitrobenzene (entries 3 and 4).
		Copper(I) iodide (0.02 mol) was added to a cooled (-8°C) solution of phenylmagnesium bromide (prepared from 0.04 g-atom of magnesium and 0.04 mol of bromobenzene in 100 ml of diethyl ether), and the mixture was stirred at that temperature until Gilman colour test I
		To the cuprate reagent (prepared in a 0.02 molar scale from 0.04 mol of phenylmagnesium bromide and 0.02 mol of copper(I) iodide in THF at -8°C was added nitrobenzene (0.01 mol) or copper(II) chloride (0.01 mol) and the mixture was stirred at this temperature for 1 h then at room temperature for 1 h.
	www.erowid.org /archive/rhodium/chemistry/cu-grignard.coupling.html (2224 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The method is based on the fact that when a salt of oxide of copper in solution is mixed with iodide of potassium in excess, cuprous iodide and free iodine are formed, the iodine remaining dissolved in the solution of iodide of potassium.
		Introduce a measured amount of cupric oxide solution, add an excess of potassium iodide (one part KI to ten water), and then proceed without delay to determine the liber- ated iodine by means of hyposulphite of sodium.
		The copper solution must be free from ferric oxide and other bodies which decompose iodide of potassium, also from free nitric and hydro- chloric acid.
	www-tech.mit.edu /archives/VOL_001/TECH_V001_S0065_P003.txt (561 words)

	Copper Chemistry
		Copper(I) compounds are expected to be diamagnetic in nature and are usually colourless, except where colour results from charge transfer or from the anion.
		The cuprous chlorides, bromides and iodides are colouless, diamagnetic compounds.
		Addition of soluble iodide to an aqueous solution of copper(II) ions results in the formation of a copper(I) iodide precipitate, which rapidly decomposes to Cu(I) and iodine.
	wwwchem.uwimona.edu.jm:1104 /courses/copper.html (2499 words)

	Copper(I) iodide
		Section 313 This material contains Copper(I) iodide, 98% (listed as COPPER), 98%, (CAS# 7681-65-4) which is subject to the reporting requirements of Section 313 of SARA Title III and 40 CFR Part 373.
		STATE Copper(I) iodide, 98% can be found on the following state right to know lists: California, (listed as COPPER), California, (listed as COPPER COMPOUNDS, N.O.S.), New Jersey, (listed as COPPER), Florida, (listed as COPPER), Pennsylvania, (listed as COPPER), Minnesota, (listed as COPPER), Massachusetts, (listed as COPPER).
		In no way shall Fisher be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Fisher has been advised of the possibility of such damages.
	avogadro.chem.iastate.edu /MSDS/CuI.html (1112 words)

	Copper (Site not responding. Last check: 2007-10-08)
		Upon removal of the iron slag, the copper(I) sulfide that remains is reduced to copper by heating in a controlled amount of air.
		At about 300 deg C copper is attacked by air or oxygen, and a fl coating of copper(II) oxide forms at the surface; at a temperature of 1,000 deg C copper(I) oxide is formed instead.
		When copper is not attacked by water or steam, and dilute nonoxidizing acids, such as dilute hydrochloric and dilute sulfuric acids, have no effect in the absence of an oxidizing agent.
	socrates.berkeley.edu /~eps2/wisc/copper.html (916 words)

	Copper Iodide 1a
		The masses of: copper and iodine reacted and copper iodide formed are calculated automatically as well as their corresponding numbers of moles.
		The theoretical number of moles and mass of iodine reacting are also calculated based upon the mass of copper reacted.
		Theoretical plots, based on various formulae for copper iodide, may be displayed by changing the values of MolesCu and MolesI on the spreadsheet.
	website.lineone.net /~aberdareco/PAGES/ChemStu/Chemhtml/cu1a.htm (684 words)

	Uptake of Iodide by a Mixture of Metallic Copper and Cupric Compounds (Site not responding. Last check: 2007-10-08)
		Ability of copper/cupric compound mixtures to remove iodide from solution was investigated to predict sorption of radioactive iodine in the environment and to assess their use in a nuclear reprocessing method.
		Reaction of iodide with copper powder and azurite crystal or copper plate and azurite powder have also been investigated, leading to precipitation of CuI onto massive copper phase.
		It is proposed that soluble copper released by the cupric compound is reduced at the surface of metallic copper, leading to a preferential precipitation of CuI on copper surface.
	pubs.acs.org /cgi-bin/abstract.cgi/esthag/1999/33/i10/abs/es981034y.html (209 words)

	CHE 11 Lab-Sequence of Reactions
		The copper(I) cation then reacts with excess iodide ions to form the insoluble white copper(I) iodide which may then be collected and weighed.
		Obtain a length of copper wire that weighs between 0.8 and 1.0 g and weigh it to the nearest milligram.
		Calculate the mass of copper in the copper iodide recovered and compare this with the mass of original copper metal.
	web.centre.edu /che/che11_lab/sequence_reactions.htm (1032 words)

	Chemistry 112, Problem Set Number 4 (Site not responding. Last check: 2007-10-08)
		For the process: 20 mL of 0.0002 M potassium sulfide is stirred together with 1 mL 0.06 M iron(II) iodide.
		Find 'Q' for the precipitate that might form when 100 mL of 0.082 M chromium(II) iodide is gradually added to 1 mL of 0.000002 M potassium hydroxide.
		Find 'Q' for the precipitate that might form when 10 mL of 0.015 M copper(II) iodide is stirred together with 20 mL of 0.00002 M rubidium hydroxide.
	people.morehead-st.edu /fs/w.cain/hw4t_z.html (2933 words)

	Copper(II) chloride - Wikipedia, the free encyclopedia
		However certain other ligands such as phosphines (e.g., triphenylphosphine) and even some tertiary amines cause reduction to copper(I) complexes.
		Reduction to copper(I) chloride can be effected simply by heating CuCl
		However, it is generally more convenient to work in aqueous solution, and to use a reducing agent such as sulfur dioxide to make CuCl:
	en.wikipedia.org /wiki/Copper(II)_chloride (785 words)

	JCE 2001 (78) 235 [Feb] The Synthesis and Analysis of Copper(I) Iodide. A First-Year Laboratory Project
		JCE 2001 (78) 235 [Feb] The Synthesis and Analysis of Copper(I) Iodide.
		The copper(I) iodide can be prepared by either direct reaction of the elements in toluene or reaction of iodide with a copper(II) salt.
		Characterization of this lower-oxidation-state iodide of copper is accomplished by determination of copper by precipitation and weighing of cupric oxide, and by determination of iodine by oxidation to I
	jchemed.chem.wisc.edu /journal/Issues/2001/Feb/abs235.html (358 words)

	Basic Chemical Knowledge for Students Beginning CEM 221
		Know the symbols (or formulas) for, and the charges on, ions such as: sodium ion, potassium ion, magnesium ion, iron (III) ion, copper (II) ion, copper (I) ion, fluoride, chloride, bromide, and iodide ions, nitrate ion, sulfate ion, carbonate ion, bicarbonate (or hydrogen carbonate) ion, hydroxide ion, ammonium ion.
		Be able to write correct formulas for compounds such as: water, hydrogen sulfide, ammonia, methane, hydrogen chloride, sulfuric acid, potassium hydroxide, sodium bicarbonate, sodium sulfate, calcium chloride, ammonium nitrate, copper (I) iodide.
		Be able to use the periodic table to find the atomic weights of elements and to calculate the molecular weights (or formula weights) of compounds.
	www.bluffton.edu /homepages/facstaff/bergerd/classes/CEM221/Basics/home.html (416 words)

	Electrode potentials and feasibility of reaction
		There are three redox processes in this scheme: the oxidation of copper to copper(II) ions with concentrated nitric acid; the reduction of copper(II) ions to solid copper(I) iodide; the reduction of the liberated iodine to iodide ions with thiosulphate ions.
		The reaction of iodide ions with copper(II) ions.
		The key to the 'problem': the insolubility of copper(I) iodide.
	www.rod.beavon.clara.net /feasibility.htm (674 words)

	Iodometric Determination of Copper in Brass
		The amount of iodine liberated in the reaction between iodide ion and an oxidizing agent is a measure of the quantity of oxidizing agent originally present in the solution.
		This is a rapid, quantitative reaction in slightly acidic solutions, if there is a large excess of iodide ion present and if the copper is in the form of a simple ion rather than a complex one.
		The reaction involving cupric ion and iodide takes place quantitatively since the cuprous ion formed as result of the reduction is removed from the solution as a precipitate of cuprous iodide.
	www.csudh.edu /oliver/che230/labmanual/copbrass.htm (2912 words)

	copper
		Copper(II) ions oxidise iodide ions to iodine, and in the process are themselves reduced to copper(I) iodide.
		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.
	www.chemguide.co.uk /inorganic/transition/copper.html (1165 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		example, silver bromide and silver iodide; or they may be of the core-shell-type, having a discrete core of one halide ratio, and a discrete shell of another halide ratio.
		The preferred photosensitive, pre-formed, iridium and copper doped silver halide grains used in the present invention are characterized by their doped core-shell structure wherein the surface layer, known as the "shell" has a lower silver iodide content than the internal phase or bulk, known as the "core".
		If the silver iodide content in the surface layer of the doped core-shell silver halide grains is higher than or equal to that in the internal phase, disadvantages such as increased
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/59279.981230&ELEMENT_SET=DECL (8947 words)

	[No title]
		From the spectra, lðmax and eð values can be determined and compared. Based on this data, a limited spectrochemical series can be derived. Procedure: Preparation of Diaquobis(ethylenediamine)copper(II) iodide: [Cu(en)2(H2O)2]I2 Combine copper(II) acetate (1.9 g, 0.0095 mol) with 5 mL of water.
		Dissolve potassium iodide (4.2 g, 0.025 mol) in a minimum amount of water and add it to the reaction mixture and heat the reaction mixture to 60 (C. Remove any undissolved material by vacuum filtration of the hot solution and cool the filtrate in an ice bath.
		The final solution is prepared by dissolving approximately 0.5 g of diaquabis(ethylenediamine)copper(II) iodide in water.
	people.morehead-st.edu /fs/a.macintosh/351expt1.doc (403 words)

	American Elements: Copper Iodide Supplier & Tech Info
		Copper Iodide is insoluble in water, and is often used in the synthesis of fine chemicals, and as a heat and light stabilzer for nylon fabrics.
		Copper Iodide is generally immediately available in most volumes.
		Treating an iodide with manganese dioxide and sulfuric acid sublimes the iodine.
	www.americanelements.com /cui.htm (83 words)

	Nuffield Advanced Chemistry - During the reaction between copper(II) sulphate and potassium iodide a white precipitate ...
		Nuffield Advanced Chemistry - During the reaction between copper(II) sulphate and potassium iodide a white precipitate is formed of copper(I)iodide.
		During the reaction between copper(II) sulphate and potassium iodide a white precipitate is formed of copper(I)iodide.
		Colour in transition metal ions often arises when the 3d energy levels are not full and when the ligands around the metal ion are such that the five energy levels split into two groups with slightly different energies.
	www.chemistry-react.org /go/Faq/Faq_11339.html (248 words)

	Mineral Info, Malachite
		The metal is attacked by sulfur vapor, with the formation of copper(I) sulfide; and by the halogens, which form copper(II) halides, except iodine, which forms copper(I) iodide.
		Silver iodide is used for fast films, silver bromide for slower films and fast-printing papers, and silver chloride for most printing papers.
		Finally, in the form of silver iodide, it is used to seed clouds for WEATHER MODIFICATION purposes.
	www.mine-engineer.com /mining/mineral/minrl2.htm (3209 words)

	brass
		The amount of copper in brass may be found by converting the brass sample to a nearly neutral solution of copper(II) ions, and treating this with potassium iodide.
		Copper(II) ions are reduced to copper(I), precipitated as the iodide CuI, and iodine is liberated.
		However, excess of nitrate ions in a strongly acidic solution do; since they are oxidising agents under these conditions, and iodide ions are good reducing agents, any excess of nitric acid will oxidise the iodide ions to iodine and will give an erroneous endpoint:
	www.rod.beavon.clara.net /brass.htm (496 words)

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