Question

Copper reacts with concentrated nitric acid

Answer 1

Answer:

Copper and Nitric Acid

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.

Explanation:

Nitric acid reacts with copper according to the reaction:

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. The nitrogen dioxide is a maroon vapor.

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