Question

20硫酸铜溶液与10克氢氧化钠混合液恰好完全反映,得到沉淀1.96克 1.求硫酸钠质量2.硫酸铜溶液和

Answer 1

CuSO4 + 2NaOH = Cu(OH)2 + Na2SO4

x/160 = y/80 = 1.96/98 = z/142

m(Na2SO4)=z=2.84g

x=3.2g；CuSO4%=3.2/20=16%

y=0.16g；NaOH%=1.6/10=16%

Na2SO4%=2.84/(30-1.96)=10%