are there any promblems associated with using copper??? ancwer thank you all?
916079
Toxicity:\n\nAll copper compounds, unless otherwise known, should be treated as if they were toxic. Thirty grams of copper sulfate is potentially lethal in humans. The suggested safe level of copper in drinking water for humans varies depending on the source, but tends to be pegged at 1.5 to 2 mg/L. The DRI Tolerable Upper Intake Level for adults of dietary copper from all sources is 10 mg/day. In toxicity, copper can inhibit the enzyme dihydrophil hydratase, an enzyme involved in haemopoiesis.\n\nA significant portion of the toxicity of copper comes from its ability to accept and donate single electrons as it changes oxidation state. This catalyzes the production of very reactive radical ions such as hydroxyl radical in a manner similar to fenton chemistry. This catalytic activity of copper is used by the enzymes that it is associated with and is thus only toxic when unsequestered and unmediated. This increase in unmediated reactive radicals is generally termed oxidative stress and is an active area of research in a variety of diseases where copper may play an important but more subtle role than in acute toxicity.\n\nAn inherited condition called Wilson's disease causes the body to retain copper, since it is not excreted by the liver into the bile. This disease, if untreated, can lead to brain and liver damage. In addition, studies have found that people with mental illnesses such as schizophrenia had heightened levels of copper in their systems. However it is unknown at this stage whether the copper contributes to the mental illness, whether the body attempts to store more copper in response to the illness, or whether the high levels of copper are the result of the mental illness.\n\nToo much copper in water has also been found to damage marine life. The observed effect of these higher concentrations on fish and other creatures is damage to gills, liver, kidneys, and the nervous system.\n\n\nMiscellaneous hazards\n\nThe metal, when powdered, is a fire hazard. At concentrations higher than 1 mg/L, copper can stain clothes and items washed in water.
385723
Pennies from 1980/81 and before are already pure copper, so no work would be necessary, other than cleaning them.  New pennies are copper-plated zinc.  A simple way to extract the copper is to make a gash in the side of the penny, then drop the penny in some hydrocholoric acid.  The HCL will react with the zinc to form zinc chloride (expelling hydrogen gas), but will not react with the copper.  This will leave you with a thin copper shell (FYI, this is a common high school/general chemistry experiment).  It is actually a fairly cool experiment.
889558
copper metal is listed as "very unreactive".  This means it is relatively stable as a metal, and relatively unstable as an ion.\n\nMagnesium metal "reacts with acids" so it is more stable in ionic form than copper,and less stable as pure metal.\n\nThe goal of nature is to go from an net unstable form to a more stable form.  (This is called reducing the free energy, or delta G of a system).\n\nIn order to use the activity series:\n\nany metal below a given metal is less stable in ionic form and more stable as a pure metal.\n\nThis means that a pure metal can reduce the ions of any metals below it.\n\nFor example, aluminum metal can reduce manganese ions, zinc ions, and so on because they are below it.\n\nAluminum metal cannot reduce magnesium ions, calcium ions, and other metals above it.\n\nI hope you can get it now.  Ok I am sure what I typed is correct now.  Good luck!\n\nhttp://en.wikipedia.org/wiki/Activity_series
85537
Hi Oldinway\n\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content. The addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the ?, ß,?, etc., constituents.\n\nThe copper alloys may be endowed with a wide range of properties by varying their composition and the mechanical and heat treatment to which they are subjected. For this reason they probably rank next to steel in importance to the engineer.\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content.\n\nThe addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the a, b, g, etc., constituents.\n\nThere is a certain connection between the properties and the microstructure which may be expressed in general terms.\n\nThe tensile strength increases with increase in zinc content, rises somewhat abruptly with the appearance of b, and reaches a maximum at a composition corresponding roughly to equal parts of a and b. It falls off rapidly at the appearance of the g constituent.\n\nElongation rises to a maximum and begins to fall again before the composition reaches the limit of the a solution. It falls considerably as the amount of b increases, and is very small in the presence of g.\n\nThe a constituent shows the greatest resistance to shock. This is diminished by the presence of b, and the alloy becomes extremely brittle when g is present.\n\nHardness is greatly increased by the presence of b and still further when g appears.\n\nAlloys containing a phase only are specially suitable for cold working, and may be hot- or cold rolled. Those containing a and b will suffer very little deformation without rupture in the cold rolling and may only be hot rolled. The b constituent may also be forged, rolled or hot extruded, but alloys containing g should invariably be avoided for any mechanical treatment.\n\n\nDesignation system of brasses\nThe brasses of industrial importance are often designated by their copper and zinc content.\n\nC 23000 - Red Brass (85 Cu, 15 Zn)\nThis alloy is used for ornaments and for cheap jewellery which is to be gilded: it withstands cold-work, cupping, etc. On account of the range of solidification, the cast material has a dendritic structure.\nIf cooled very slowly or annealed, diffusion takes place, yielding polyhedral grains of uniform composition. The process of diffusion is assisted by mechanical deformation of the grains by hot- or cold work followed by annealing. The changes which occur in rolling and annealing are similar to those described for 70:30 brass.\n\n\nC 26000 - Cartridge Brass (70 Cu: 30 Zn)\nThis alloy, which is used widely for tubes, sheets and wires, also shows a dendritic structure of the a solid solution when chill fast. The b constituent does not begin to appear in the cast structure until the zinc exceeds 32% except in the presence of an additional element like aluminum or tin.\nAfter annealing, the alloy consists of homogeneous solid solution, and it is specially suitable for cold-working. To withstand this treatment, especially drawing, it is necessary that the brass should be perfectly sound and free from impurities.\n\nSince high grade 70:30 brass is usually made from the purest copper and zinc available without admixture of any but the cleanest scrap, these impurities are chiefly inclusions of dross (oxides or silicates) or charcoal. Such inclusions, if present, frequently lead to failure of the material during manufacture or in use. They become entrapped in the solidifying metal, either by splashing or by rapid solidification in moulds of small cross section.\n\nIt is a frequent procedure in casting brass to
145303
Basically, you just need two different types of metals to generate a current. I assume your using copper as your other metal type.\n\nIf you dont have any zinc wire, you could try using a galvanized (zinc coated) screw.\nOr if you want to use another metal all together, try Aluminum in the form of Aluminum foil.  An Iron nail or a chunk of lead would also work, but not as well.
223614
copper and aluminum are best electricity conductors. I would say lead, since it's one of the densiest material out there. Heat is caused by vibrating atoms, denser material means the atoms are closer, and it's melting point is low too. As soon as you touch it with a hot soldering iron, the heat transfers right away and melts it.
811653
copper or stainless steel fittings will not be harmed, but aluminium can dissolve in sodium hydroxide, although the rate is small though; you wouldnt see a difference unless your entire sink was made of Al alloy and you used drain cleaner every single day.\n\nceramic/porcelain are also safe as they are enameled.
979004
copper is a ductile metal, which means it can be drawn into wires easily, and is not naturally very brittle. however, by certain processes, it can be made brittle. for example, by heat strenthening that is, copper is heated to high temperatures and then suddenly colled by plunging it into water. continuously doing this can make the copper more brittle.
195781
None. "A more active metal will displace a less active metal from a solution of its salt." Copper and lead are both less active than zinc. Obviously, zinc won't displace itself from zinc sulfate.
929944
Nickel is harder than copper and provides better penetration into the target. Copper is softer and tends to mushroom much faster once it enters its target. \nIf you want penetration go for the nickel\nIf you want displacement go for the copper
793636
shawty's NOT good at stoichiometry...has made a fundamental error in the final line so end result is rubbish...\nhow can you end up with MORE Cu than you started with when it's 2 moles : 2moles? \n\n(8/159)x 127 = 6.4 g
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Yes,  I had a friend that was allergic to copper. She found out the hard way and ended up in the hospital. It would enter her system through her skin, jewelery, cooking pots, meds, she had to be very careful. This was back in the 60s. I don't recall too much about her diagnosis except that she was very ill for a while and it was do to copper.   \n\nI almost forgot,  Plastic, yes, there is an allergy to plastic gloves and now warning on Tampax too. Something to do with plastic.
1002183
Concentrated Nitric Acid and copper.  Be careful.  Nasty stuff... really!
1131804
You have the potential for galvanic corrosion.  Essentially, two metals at different potentials share electrons and one metal (the one with the higher potential) will start to erode and "plate" the other metal.\n\nTypically, using some sort of material that is a non-conductor (ceramics, rubber, etc) between the two or passivating the metal surfaces or coating the metal surfaces (prime and paint per ANSI standards) are your best options to prevent this.
975863
Connection? or disconnection...\n\nSemiconductors are not metals - nor do they intend to be.
731827
Firstly, and most importantly, the word 'cuprum' isn't a word, at least not in latin or english, as far as I know, and I study latin. The word for copper in latin is '(h)enus'\n\nSecondly, you need to at least act sure about what you're saying. Write with conviction, even if you don't have any. Don't say "never really discovered", either it was or it wasn't. \n\nThirdly, you need punctuation. After "certain point in time" add a comma. You also need a comma after pipes in the phrase "guns, pipes, and even blue fireworks." Plus, fireworks is one word. You need to turn this from one paragraph into at least two different ones. \n\nRephrase the whole section with the two sentences "in the bloodstream. But large amounts" etc. That can be turned into better sentences, or one sentence. \n\nIn the sentence "But large amounts" after 'but' add an 'in' and get rid of the comma after amounts. Also, you should change deathly to deadly, or something else. The sentence should look like this:\n\n"But in large amounts copper can be poisonous or even deadly to organisims."\n\nor:\n\n"But, in large amounts, copper can be poisonous or even deadly to organisms."\n\nYou might also want to add an adjective describing the organisms. \n\n\nWith the next sentence, add 'the' between 'in' and 'water'. \n\n\nRephrase the last setence too- it doesn't really make sense,\nPossibilities:\n\n"The effect of too much copper is damage to gills, liver, kidneys, and the nervous systems of fish and other animals."\n\nIt's too long. you should probably change it into two sentences. \n\n"This has many bad effects on land animals and fish. Some things that could happen are damage to the gills, liver, kidneys, and the nervous system." \n\n\n\nI hope I helped.
882235
In an electrolytic cell you can plate most any metal that doesn't quickly react with the solvent and its solutes.  The force of the copper ions gaining electrons at a negative charged zinc electrode is certainly possible.\n\nSince the copper would receive two electrons and go from a +2 to a zero oxidation state, you would say that it is being reduced.