How do you turn a penny gold color

How do you turn a penny gold color

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To turn a penny into a gold color:Clean penny with steel wool if needed. 2) Mix 0.5 g of zinc and 25 ml sodium hydroxide…MORE?

What is this? Is this penny worth anything ? Why is it gold in co…?

http://en.allexperts.com/q/Coin-Collecting-2297/Gold-penny-1.htm

Hello, Caleb. There was a series of novelty items made a while back with cents. I think it was around the time of the bi-centennial, and they colored the cents gold and stamped each state to the right of Linclon’s head and put the state let…

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Recreate the Gold Penny Lab?

Q: In chemistry a few days ago, my class and I made a post 1982 penny turn gold color by using a liquid substance (I assume it’s NaOH) and Zinc powder. I understand how the chemical reactions work, and I want to reproduce the experiment at home. I know I can replace the zinc powder w/ galvanized nails, but I don’t know what I can do for the liquid substance. If it is NaOH, can I replace it w/ lyewater? I’d prefer to use something that is relatively safe (some idiot suggested boiling Drano). Also, if you can, I would like any safety percautions that need to be done, both pre and post lab. I have been told zinc powder, after being exposed to water, generates heat enough to light things on fire. Do galvanized nails do that? I merely want to see if I can make some gifts for my little brother and sister. Thank you in advance!

A: Galvinized nails won’t do that. Zinc powder has so much surface area that the reaction occurs very rapidly.As for the sodium hydroxide. You can buy caustic lye at any soap making store, and in the detergent aisles of some megamarts. Here’s the thing, it is very, very, VERY dangerous. Many people who used to use it to do laundry went blind because it is such a dangerous chemical. If you get it on your hands, it will burn you. I don’t know how old you are, but you need to be supervised by somebody who has experience in working with lye (maybe ye olde soapmaker?). Make a solution of lye no more than 1 molar (that is about 50 grams per liter, off the top of my head), and pour it down the drain with lots and lots of water when you are done. I know chemistry labs seem like a lot of fun, but without a teacher to supervise, a lot of dangerous thing can happen.

Turning a penny to silver and gold lab?

Q: In a lab we used zinc and NaOH to turn pennys from copper to a silver color and then into a gold color. I need help on the questions though.2) If someone says that gold was made in this activity how can you decide whether it was?4) What happens to the copper atoms originally present in the treated metal? What is an alloy and how did we make an alloy in this lab?also is it possible to convert the metal back to the original metal?

A: 2) It is “brass” not “gold”. Bite the penny – if it was gold, it would have been soft enough to leave a tooth mark.4) The copper first becomes coated with zinc. They, the alloy brass was made as the zinc and copper were melted together.

please help me with my chemistry lab!!!!?

Q: we did a chemistry lab with pennies and alloy stuff. here are some of the questions:1) Both pre- and post- 1982 pennies are mixtures composed of copper and sinc. However, the post 1982 pennies are only about 5% copper. how does changing the percent of the metal affect the physical properties of the penny?2) is the post-1982 penny and alloy?explain3)is the treated penny (which we put in a zinc sloution and chloride solution, its turned a gold color when we heated it) and allo? explain.4) Name at least two reasons alloys are used in place of pure metals.5)what type of allor (substitutional or interstitial) is the gold penny? explainthank you………….

A: 1. Changing the percent composition of an alloy will contribute to different molecular weight per mole, melting point, reactivity, etc. For example, Cu has a lower atomic weight than Zn, so technically, if the penny composition was less Cu, it would weight more being the same volume. 2. An alloy is by definition a mixture containing two or more metallic elements, and since the penny is a mixture of Zn and Cu, it is an alloy. 3. I’m not sure, I didn’t do the lab. But check the year on the penny to see what the composition might lean to. If a metal containing Zn was put into a Zn and choloride solution, Copper Chloride would probably form; it’s probably an alloy. 4. Alloys have several advantages over pure metals including such as tensile strength and shear strength. However, an alloy’s distinct differences such as density and melting point many not drastically differ from the original metal. 5. I think substitutional, but again, I didn’t do the lab so I would need to know the reactants and any solvents or catalysts.