Reaction Between Copper and Nitric acid

http://www.angelo.edu/faculty/kboudrea/demos/copper_HNO3/Cu_HNO3.htm

http://www.chem.umn.edu/services/lecturedemo/info/Acid_Rain.html

http://answers.yahoo.com/question/index?qid=20110610203130AAWnlQq

http://www.ibchem.com/faq/?p=64

http://www.ehow.com/info_8517832_type-reactions-copper-nitric-acid.html

People already have. There are pages on both substances in Wikipedia.

I have taken 3 chemistry classes and I am proud to say I can answer this ha ha. Copper doesn't always react with acids and it won't react with HCl. I think that's why you are asking. The reaction we did in my intro chemistry class was to show that Cu will react with nitric acid tho it won't react with other acids. When you mix them together a gas is formed and it is poisonous. The temp goes way up pretty fast. The pressure changes too and makes the liquids move up and down the container. The glass will turn dark brown and looked burned but the fluid color goes from a green to a bright blue. We didn't have any special conditions or have to heat anything up. We just added some Cu pieces to nitric acid. Do you need the chemical reaction? I think I can dig it out of my old notes. I'm still in school so I keep all my notes.

It dissolves the copper into a solution.

3 Cu + 8 HNO₃ → 3 Cu²⁺ + 2 NO + 4 H₂O + 6 NO₃^-

At manufacturing plant where I worked in my college days, we would sometimes "unclad" a "newer" penny of its copper leaving behind a somewhat blurred zinc Lincoln.

The nitric acid baths were used to clean platters of silicon wafers that were being polished with ammonium flouride and cupric nitric solution.

HCL will react with copper. Mix Muriatic Acid (HCL) with Hydrogen Peroxide (H2O2) to make a solution that will etch copper PC boards.

The other one is Ferric Chloride Acid. I remember it being a green colored solution - I think my memory is right.

We used this to etch PC board back in my high school electronics class. This was in the early 80's. My, time sure flies!

It makes brown nitric oxide gas, which is heavy. It fills up the beaker, flows out on the bench and makes a slow motion waterfall to the floor. Awesome!

But don't breathe it! It's highly unpleasant stuff, worse than chlorine I believe.

A detail - nitric oxide is NO and is formed first, as equation in #4, but NO is colourless. It spontaneously oxidises to brown nitrogen dioxide NO₂.