How Much is a Penny Worth The U.S. Penny The Assay The Process The Process

How Much is a Penny Worth The U.S. Penny The Assay The Process The Process www.phwiki.com

How Much is a Penny Worth The U.S. Penny The Assay The Process The Process

Yu, Justin, contributor has reference to this Academic Journal, PHwiki organized this Journal How Much is a Penny Worth Percentage Copper in a U.S. One-Cent Coin A Quantitative Analysis The U.S. Penny Mass of penny, if only Cu, worth >$0.01 Modern penny is ~2.5% copper clad Knowledge of composition important to prevent hoarding in addition to selling as long as metal Gravimetric analysis of recovered copper just one way The Assay mpenny is easy mcopper is a little harder

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The Process Obtain in addition to weigh a penny in addition to dissolve it in acid: Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Cu(s) + HNO3(aq) Cu(NO3)2(aq) + NO2(g) Do this reaction in the hood, please Unbalanced! CAUTION! 6 M HNO3 in addition to 12 M HCl are corrosive to metals. They’re also corrosive to skin in addition to clothes. Any spills must be wiped up immediately The Process Remove nitrate NO3- + Cl- Cl2(g) + NO2(g) Boil to convert Cl- to Cl2 in addition to NO3- to NO2 But solution is still too acidic Do this reaction in the hood, please But solution is still too acidic unbalanced! Reduce the acidity by reducing volume The Process Deplete remaining HNO3 Do this reaction in the hood, please HNO3(aq) + H3NSO3(aq) H2SO4(aq) + N2O(g) + H2O(l) Boil to speed the reaction, then dilute to 50 mL

The Process Convert Cu2+ to Cu+ Cu2+ + Fe2+ Cu+ + Fe3+ Add FeSO4 in excess Precipitate Cu+ as CuSCN(s) Cu+ + SCN- CuSCN Side reaction that must be considered Fe3+ + SCN- FeSCN2+ The Process Recover the Cu by vacuum filtration Rinse the beaker in addition to filter paper with dilute KSCN Eliminate water with ethanol Dry at 80º as long as 30 min Rinse the filter paper with ice-cold water REVIEW The Process Recover the CuSCN by vacuum filtration Dry at 80º, weigh Dissolve a weighed penny Precipitate Cu+ as CuSCN, convert Fe3+ to FeSCN2+ Eliminate nitrate (2 steps) Reduce Cu2+ to Cu+

This investigation, Author 1: Introduction in addition to Conclusion 2: Discussion 3: Data/Results in addition to Experimental This investigation, Author A: Introduction, Conclusion, Data/Results B: Discussion in addition to Experimental

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Yu, Justin contributor

Yu, Justin is from United States and they belong to Crave and they are from  San Francisco, United States got related to this Particular Journal. and Yu, Justin deal with the subjects like Computers; End-Users; Information Technology Industry; Internet

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