Avariety of procedural errors can impact the effectiveness of the copper reaction cycle. comment on the following documented errors: a. when naoh (aq) is added to the cu(no3)2 solution in reaction b, the cu(oh)2 (s) occasionally does not precipitate immediately, and excess naoh must be added. what other substance present in the reaction mixture might preferentially react with the naoh and prevent precipitation of the cu(oh)2? explain.