既然H2SO4过量,那么CuO,Cu就反应完了.
1.89-1.85=0.4g
根据Cu2+ +Fe=Cu+Fe2+,△m=8
64 8
x 0.04,所以x=0.32g
所以置换出的Cu0.32g
(2)0.32/64=0.005mol,0.005/0.5=0.01mol/L
(3)0.34-0.32=0.02g(O的质量)0.02/16x80=0.1g所以Cu有0.24g,0.24/0.34≈70.6%
既然H2SO4过量,那么CuO,Cu就反应完了.
1.89-1.85=0.4g
根据Cu2+ +Fe=Cu+Fe2+,△m=8
64 8
x 0.04,所以x=0.32g
所以置换出的Cu0.32g
(2)0.32/64=0.005mol,0.005/0.5=0.01mol/L
(3)0.34-0.32=0.02g(O的质量)0.02/16x80=0.1g所以Cu有0.24g,0.24/0.34≈70.6%