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Suppose you have a brass surface (~67% Cu(s), 33% Zn(s)) from which a serial number has...

Suppose you have a brass surface (~67% Cu(s), 33% Zn(s)) from which a serial number has been filed away. What would happen if this surface was treated with nitric acid (HNO3)?

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Answer #1

Answer:

HNO3 is a strong acid and a strong oxidizing agent.

Hence action of HNO3 with brass containing Cu(s) and Zn(s) will oxidize to Cu2+ and Zn2+ which ultemately gives corresponding salts Cupric nitrate Cu(NO3)2 and Zinc nitrate Zn(NO3)2 along with elimination of H2 gas.

Chemical reactions involved,

Cu (s) + 2 HNO3 --------> Cu(NO3)2 + H2 (g) and

Zn (s) + 2 HNO3 --------> Zn(NO3)2 + H2 (g)

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