(1)n(H2SO4)=0.2L*0.5mol/l=0.1MOL
n(CUSO4)=V*C(CUSO4)=0.2L*1mol/l=0.2mol
V'=n(CUSO4)/C(CUSO4)'=0.2mol/0.2mol.l-=1000ml
(2)设H2SO4的质量为Xg.
X/98g.mol-+0.1mol=1L*2mol/l得x=186.2g
m(浓H2SO4)=186.2g/98%=190g
V(浓H2SO4)=190g/1.84g·cm-3=103.2cm3加入它可能是将浓硫酸加入溶液,使体积增加,使CuSO4 物质的量浓度变小,而H2SO4 物质的量浓度增加. |