DISSOLVING the COPPER STANDARD

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

Copper wire (Cu) dissolves in Nitric Acid (HNO3)with the evolution of Nitrogen Dioxide (NO2).

  • This reaction must be carried out in the hood

  • Cover beaker with a watchglass to prevent loss by spray

QUESTIONS

Why is Nitric Acid rather than Hydrochloric Acid used to dissolve copper?
You previously prepared Nitrogen Dioxide in the NONMETALS experiment.
What are the properties of Nitrogen Dioxide?
How does it get into the atmosphere through everyday living.

RWK