Cu(s) + 4HNO3(aq) --> 2NO2(g) + 2H2O(l) + Cu(NO3)2(aq)

The solid copper is becoming blue aqeous

cupric nitrate and a brown gas NO₂

is being released.

Here we see Jared striving for accuracy by

making sure he measures the right amount of

HNO₃ to make sure all of our copper is dissolved.