Determination of the mass percentage of copper in a penny introduction this experiment will cost you one penny ($001) the penny must be minted after 1983 any penny will do for best results the penny should be relatively clean and bright, with very little staining or gross physical damage modern pennies are. Numismatic guaranty corporation of sarasota, fla, authenticated and graded a 1983-d lincoln cent as being struck on a brass planchet of a composition of 98 percent copper and 2 percent zinc that weighs 30 grams regular production 1983-d cents should be copper-plated zinc a first thought is that. American copper penny hoarding - perfect time to start - duration: 8:20 canadacoinhunting 6,883 views 8:20 over $30,000 in rare coins & currency discovered in circulation & coin roll hunting - duration: 10:34 blueridgesilverhound 431,469 views 10:34 percent composition lab - duration:. Demonstration 2 floating pennies removal of zinc from pennies objective: the different reactivities of copper and zinc to hydrochloric acid will be used to separate the two metals in a post-1983 penny the percent of zinc and of copper can be calculated as well as the economic value of each time: this activity must be. The penny: according to the us mint, pennies, despite their copper-ish color, are made mostly of zinc the major costs to mint and distribute the penny can be attributed to metal, manufacturing and transportation from 1837-1857, the cent was made of bronze: 95 percent copper, with five percent tin and.
1909-1982 copper cent values (also known as the penny) are updated daily this page measures the pure metal or melt value of us copper pennies, and includes an updated numismatic price range. At the time of world war ii, the one-cent coin was composed of 95 percent copper and 5 percent zinc these metals were denied to the mint for the duration of the war, making it necessary for the mint to seek a substitute material after much deliberation, even including consideration of plastics, zinc-coated. Just a note to startkeep in mind that in the us and canada, though they are commonly called pennies, they are technically called the one cent coins i'm sure i will mix the terminology up, but believe me some coin aficionado will correct you if you call a one cent coin a penny anticipating a rise in copper prices.
The united states one-cent coin, often called a penny, is a unit of currency equaling one-hundredth of a united states dollar the cent's symbol is ¢ its obverse has featured the profile of president abraham lincoln since 1909, the centennial of his birth from 1959 (the sesquicentennial of lincoln's birth) to 2008 , the reverse. The determination of copper in pennies by: brooke carmack abstract: the percent composition of copper was analyzed for both pre and post 1982 pennies this was determined by iodometric titration analysis 10 introduction: in this experiment, two pennies were analyzed one of the pennies was. According to the us mint, the penny continued to be made of pure copper until 1837, when the price of copper increased it cost more to make a penny than a penny was worth the penny began to be made of 95 percent copper with 5 percent zinc and tin because of world war ii, the penny became a.
And was due to the critical use of copper for the war effort however, a limited number of copper pennies were minted that year) 1962: the tin content, which was quite small, was removed that made the metal composition of the penny 95 percent copper and 5 percent zinc 1962 to 1982: penny remained 95 percent copper. But it's not just any and all pennies, henry is only interested in those that are dated from 1982 and earlier because those are the coins made with 95 percent copper a copper penny is worth more than other pennies -- now mostly made of zinc -- currently priced at $0024 the copper has such a different.
I am a student and i got an assignment form school to find out the percentage of zinc and copper in penny i am asked to find the measurements from 2 new pennies and one old so far i measured old penny from 1974 is 3150g before i did the experiment where i add the hcl to it the new penny from 2001 is 2600g before. First you should look at the date on the us penny in the old days the pennies were mostly copper, but as the price of copper metal increased there was more than a pennies worth of copper in a penny so the us mint switched to a zn core which is copper clad more trivia is that in 1943 pennies were steel. Nickels are made from the same 75-25 alloy, and the cent, once a copper coin, is now composed of copper-plated zinc the cents are less expensive for the mint to manufacture, and at 25 grams each, weight about 20 percent less than cents previously minted of 95 percent copper and 5 percent zinc, which. Determine the thickness of the copper coating present in the penny (t=v/sa = 00014cm) d what is the mass percent of copper in the penny (%m=972%) e since 1982, pennies are composed of 975% zinc and 25% copper by mass calculate the percent error between the mass percent of copper in the previous answer.
In most years before 1982, american pennies were 95 percent copper then the price of copper went up until you could get $100 worth of pennies at the bank, melt them down, and sell the metal for more than $100 so the government started using a core of cheap zinc with only a thin plating of copper. Task the price of copper fluctuates between 2002 and 2011, there were times when its price was lower than $100 per pound and other times when its priace was higher than $400 per pound copper pennies minted between 1962 and 1982 are 95% copper and 5% zinc by weight, and each penny weighs 311 grams.
However, when the us mint struck its first one-cent coins—then the size of today's half-dollars and 100-percent copper—in 1793, americans continued to use the british term out of habit 4 benjamin franklin reportedly designed the first american penny in 1787 known as the fugio cent, it bears the image. Copper pennies are valuable (they're worth more than face value) here's a list of the copper pennies you should be looking for, and their current value. Now, even the lowly copper penny may lose its integrity the treasury plans to introduce copper-plated zinc pennies later this year - enriching some coffers and depleting others - if it gets a favorable ruling in a court case to be decided soon the new penny would consist of 24 percent copper and 976.
A penny is not what you think indeed, from 1793 to 1837, a cent was pure copper but newer pennies are made mostly of zinc here's the history, according to the us mint: from 1837 to 1857, the cent was made of bronze (95 percent copper, and five percent tin and zinc) from 1857, the cent was 88. Copper in post-1982 pennies 1 the problem statement, all variables and given/ known data the total mass of each penny is 2500g, the density of copper is 896 g/ml, the density of zinc is 714g/ml and the mass of a penny if it was 100% copper would be 311g 2 relevant equations 3 the attempt at a. The prices of most commodities have risen substantially since 2001, and some of the coins you have in your pocket or piggy bank are worth a lot more today than in the past pennies used to be made from 95 percent copper, at least until 1982 the price of copper has risen dramatically since the turn of the century, making.