How do you balance cu plus hno3 ----- cuno32 plus h2o plus no?

Answer 1

No. In concentrated nitric acid, the reaction produces copper (II) nitrate, nitrogen dioxide (a toxic, brownish colored gas) and water. The reaction is as follows:

Cu(s) + 4HNO3(aq) --> Cu(NO3)2(aq) + 2NO(g) + 2H2O(l)

In diluted nitric acid, the reaction produces copper (II) nitrate, nitric oxide (NO), and water. The reaction is as follows:

3Cu(s) + 8HNO3(aq) --> 3Cu(NO3)2(aq) + 2NO(g) + 4H2O(l)

(Source: www.angelo.edu)

Answer 2

To balance the chemical equation Cu + HNO3 → Cu(NO3)2 + H2O + NO, start by balancing the atoms of Cu and N. First, balance Cu by placing a coefficient of 4 in front of Cu(NO3)2. Then balance N by placing a coefficient of 2 in front of HNO3 and NO. Finally, balance the remaining atoms. The balanced equation is 3Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO.