chemische formule: 1. 1 g Cu / l 2 to 5% HNO3 2. 1.26 g CuO / l 2 to 5% HCl 3. 10 g Cu / l 2 to 5% HNO3 4. 12.6 g CuO / l 2 to 5% HCl 5. 3.802 g Cu(NO3)2.3H2O / l H2O 6. 3.802 g Cu(NO3)2.3H2O / l 2 to 5% HNO3 7. 2.683 g CuCl2.2H2O/ l 2 to 5% HCl