需要配制1L含0.5mol NH4Cl,0.16mol KCl,0.24mol K2SO4的某营养液,若用KCl,NH4Cl,(NH4)2SO4三种A.0.4,0.5,0.12.B.0.66,0.5,0.24.C.0.64,0.5,0,24.D.0.64,0.02,0.24,物质的量
问题描述:
需要配制1L含0.5mol NH4Cl,0.16mol KCl,0.24mol K2SO4的某营养液,若用KCl,NH4Cl,(NH4)2SO4三种
A.0.4,0.5,0.12.B.0.66,0.5,0.24.C.0.64,0.5,0,24.D.0.64,0.02,0.24,
物质的量
答
请把问题说清?是求物质的量,还是体积
答
选“D” 1L含0.5mol NH4Cl,0.16mol KCl,0.24mol K2SO4的某营养液中含K+ 0.16+0.24×2=0.64mol NH4+ 0.5mol Cl- 0.66mol SO42— 0.24mol因此需KCl 0.64mol NH4Cl 0.02mol (NH4)2SO4 0.24mol