I have to write a proposed copper cycle for chem 130 and with 4 reactions to get back to copper. I can use acetone, zinc powder, HCl, HNO3, H2SO4, and NAOH. I'm really confused on how to go about determining a copper cycle.
Limestone is just CaCO3. This salt produces a basic solution when dissolved in water because it is the salt of a strong base (Ca(OH)2) and a weak acid (H2CO3). The (CO3)2- carbonate ions go through hydrolysis with water, (CO3)2- + H2O --> H2CO3 + OH- (not balanced). The production of the OH- ions makes the solution basic. The acids you listed react are neutralized by the OH- .
This Site Might Help You. RE: copper cycle with HCl, HNO3, H2SO4, and NaOH? I have to write a proposed copper cycle for chem 130 and with 4 reactions to get back to copper. I can use acetone, zinc powder, HCl, HNO3, H2SO4, and NAOH. I'm really confused on how to go about determining a copper cycle.
First, you need to dissolve the copper, and the only way to do that is by using HNO3, since none of the other chemicals will dissolve it. Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O Next, you need to be able to extract the copper from the solution. NaOH will help, as copper hydroxide is insoluble. Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3 Filter off the hydroxide and wash the residue with water to remove sodium and nitrate ions. Next, you have to make it soluble again so you can reduce the copper ion more easily. React the hydroxide with HCl or H2SO4 (I would recommend HCl). Cu(OH)2 + 2HCl → CuCl2 + 2H2O Finally, add zinc powder to the CuCl2 solution. This will reduce the copper ion back to copper. CuCl2 + Zn → ZnCl2 + Cu Add extra HCl if you have left-over zinc. Then filter off the solid copper, wash with some water and then some acetone, then air-dry.
