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- or how else would you go about making copper oxide?
- Or you can produce copper oxide from copper metal. Copper (II) oxide is one of the products in the copper cycle series of reactions. Dissolve copper metal in nitric acid, then neutralize with sodium hydroxide. If you're not careful it will form copper oxide on the spot if it gets too hot. Allowing the copper (II) hydroxide to sit overnite will allow it to decompose to black copper oxide.
- I want to make Solid Copper Rings, using a wax pre-moulding creation process.
- New to group but experienced in metal working. I hope I am not overstepping my bounds here. Copper melts at 1980 degrees. You will need a crucible other than metal. I suggest ceramic. Aluminum however melts at 1640. And can be melted in a metal crucible made of angle iron or something steel. Your molds are a different issue. Are you going to sand mold them or lost wax? Hope this helps. As for copper rings why not just copper tubing and sand the edges? If the size is an issue just get heavy gauge copper wire from electrical supply and solder. Can you tell me anything about any Christian roll playing games? I m doing this for my daughter she is young and had a vivid imagination so I thought lets use it.. Jeff Ironworker/blacksmith a novice metal caster.
- I have a pipe that was damaged inside in the middle of a plastered wall. I cut the damaged section off and cut a new section to fit. When I use my blowtorch to solder it all together the pipes expand and seal, however when it cools the whole section contracts and my joints crack open at the joints because the pipe above and below are held in by the plaster. I wouldn’t like to chop out any more plaster then necessary. Is there a special technique to overcome this problem? I wouldn’t like to have a screw joint inside my plasterwork either.Any advice and tips would be appreciated.
- Clean the end of the pipe with 'wet and dry' paper or emery cloth. Clean it by going around the pipe, not longitudinally. (that's important). Wipe the cleaned area with a smearing of flux. Apply heat just before the cleaned area, NOT on it otherwise you will quickly cause oxidation. Your torch should be about 60% of it's max. Too hot and the copper will oxidise, too cool and it won't be hot enough to melt the solder. Ensure that you are using the correct melting point solder for the job. Hold the solder in one hand and apply it to the tube, playing the flame on and off and round the pipe. You need to get the heat to just the point where the solder begins to run. As soon as the solder runs, wipe it round with a mole skin cloth. (I use a leather garden glove, it works a treat, I can wipe it round and clean without getting burned leaving the end just silvered. When you have mastered that then you can move on to joining the pipes together with an end solder socket or, if you prefer, a yorkshire soldered socket. If the copper pipe changes color to a light reddish brown then you have applied too much heat. Likewise if the solder runs off like water. You need to get the heat to where the solder is between running off and being plastic.
- what is it used for and why is copper important Thanks
- pennies are not made from copper anymore. That would mean the base metal used is about 200x the value of the penny itself. Copper today is used largely in electrical for wiring because copper is an excellent conductor. It is also quite commonly used as plumbing piping because it is non-ferrous so you wouldn't get an irony taste in your water, it is quick to use and does not corrode as easily as ferrous metals when used in a plumbing application. Plastic products today tend to be replacing copper more and more but it will always be used on a commercial/industrial level. It also gets used for high pressure gas supplies of natural gas, nitrogen, medgas, etc. Also, additional fact, scrap copper is about $4 per lbs at the moment where I live.
- if you have saltwater wither running threw or surrounding copper piping will it corrode it?
- Perhaps the difference of opinion is because ocean water has lots of other chemicals, and extremely pure salt and water are much more expensive. Trace amounts of copper chloride likely are not harmful to humans, who won't be drinking salt water. Neil
- My cousin, of whom recently retired as a sergeant for our local police force. Joe the Plumber. Morons that steal copper from work sites.
- we are doing a lab in school where we test the reactiveness of copper, magnesium and zinc in solutions of copper nitrate, magnesium nitrate and zinc nitrate.my results show that copper doesn't react with any of those, zinc only with copper nitrate and magnesium with both copper nitrate and zinc nitrate.if my answers are right, can someone please explain to me why that happensthanks so much
- What you are observing is a 'redox' reaction (reduction and oxidation). What is going on at the molecular level is a kind of 'competition for electrons', The most reactive elements will have the biggest tendency to get rid of their electrons. If you add copper to the solutions, since copper is the least reactive element, it will have a stronger attraction for the electrons than zinc and magnesium ions, so it will keep them, and everything will stay as it is. Zinc is more reactive than copper but less reactive than magnesium, hence it will take electrons from the magnesium, but not from the copper. If you add a piece of zinc to copper nitrate, you are putting the zinc atoms in contact with the copper ions. Since the copper ions have a stronger attraction for the electrons than the zinc ions, the electrons will transfer from the zinc to the copper, so the copper becomes solid and the zinc dissolves. When you add it to the magnesium solution, nothing happens because the magnesium ions have less of an attraction for the electrons than the zinc atoms, so the electrons will just stay with the zinc and nothing will happen. If you want to read more, do a search for metal displacement reactions, since this is the name for the reactions that are occuring. One metal displaces the other; as one metal dissolves, the other metal becomes solid again. Hope that helped, Dan.
- How many atoms are present in a 1.09-m length of 20-gauge copper wire? A 20-gauge copper wire has a diameter of 0.03196 in., and the density of copper is 8.92 g/cm3.
- you made lots of mistakes in that answer... and it ends up wrong