Question

How we can balance the chemical equation-
copper is added to concentrate nitric acid



( plz give me the broad answer)
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Answer 1

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When concentrated nitric acid is dropped on a copper disk in the bottom of a glass cylinder, a reddish-brown cloud of nitrogen dioxide gas is rapidly evolved. ... 4 HNO3(l) + Cu(s) ==> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l) The copper nitrate salt that forms is a deep blue color.

Answer 2

Answer:

products are copper nitrate , water and nitrogen dioxide

Explanation:

Cu + 4HNO3 --> Cu(NO3)2 + 2H2O + 2NO2