n cuso4 = 200x 16% : 160=0.2 ( mol)n (naoh) = 200x10%:40= 0,5n cuso4 < n (naoh)/2 -> naoh dưpt cuso4 + 2naoh------> cu(oh)2 + na2so4 0.2 0.4 0.2 0.2 (mol)
n cuso4 = 200x 16% : 160=0.2 ( mol)n (naoh) = 200x10%:40= 0,5n cuso4 < n (naoh)/2 -> naoh dưpt cuso4 + 2naoh------> cu(oh)2 + na2so4 0.2 0.4 0.2 0.2 (mol) cu(oh)2 ----> cuo +h20 0.2 0.2n cuo= 0,2 -> mcuo =ma = 0.2x80=16 (g)b) mdd =200+200=400 , n (Na2SO4)= 0,2 > m (Na2SO4)= 0,2x142=28,4c%= 28,4/400x100%= 7,1%