2NaOH+CuSO4=Na2SO4+Cu(OH)2↓``````````160````````````````````98``````````x克````````````````200+800-951克160/x=98/(200+800-951)x=80克Cuso4质量分数为(80/800)*100%=10%
要点;沉淀800+200-951=49g 再利用化学方程式
