What type of process / chemical change is observed in:a. Precipitation of Copper (II) Hydroxide - when cupric nitrate is added sodium hydroxideb. Formation of Cupric Oxide - when cupric hydroxide is heated to form cupric oxidec. Conversion of cupric oxide to cupric sulfated. when zinc dust is added to cupric sulfatee. when HCl is added to the precipitate of CuSO4Please help me. I think this will be included in my exam. And I really need to know the answers. Thanks!
Sounds like you are doing Ye Olde Copper Lab. I've had my students do it for almost 40 years. a. Cu(NO3)2(aq) + 2NaOH(aq) --> Cu(OH)2(s) + 2NaNO3(aq) .... double replacement b. Cu(OH)2(s) --> CuO(s) + H2O(l) .... decomposition c. CuO(s) + H2SO4(aq) -->CuSO4(aq) + H2O(l) d. CuSO4(aq) + Zn(s) --> Cu(s) + ZnSO4(aq) e. There is no precipitate of copper sulfate after zinc is added to the solution. Copper(II) sulfate is quite soluble in water. Do you mean the copper metal, by any chance? Copper metal won't react with HCl to make CuCl2 and H2 gas as do many other metals. Cu metal will react with concentrated HCl by a different mechanism over a long period of time.
