VmLAl2(SO4)3溶液中含Al3+ a g,取V/4mL溶液稀释到4VmL,则稀释后溶液中硫酸根离子的物质的量浓度为?A (125/9)× a/V mol/Lb (125/18)× a/V mol/Lc (125/36)× a/V mol/Ld (125/54)× a/V mol/L
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![VmLAl2(SO4)3溶液中含Al3+ a g,取V/4mL溶液稀释到4VmL,则稀释后溶液中硫酸根离子的物质的量浓度为?A (125/9)× a/V mol/Lb (125/18)× a/V mol/Lc (125/36)× a/V mol/Ld (125/54)× a/V mol/L](/uploads/image/z/4327220-20-0.jpg?t=VmLAl2%EF%BC%88SO4%EF%BC%893%E6%BA%B6%E6%B6%B2%E4%B8%AD%E5%90%ABAl3%2B+a+g%2C%E5%8F%96V%2F4mL%E6%BA%B6%E6%B6%B2%E7%A8%80%E9%87%8A%E5%88%B04VmL%2C%E5%88%99%E7%A8%80%E9%87%8A%E5%90%8E%E6%BA%B6%E6%B6%B2%E4%B8%AD%E7%A1%AB%E9%85%B8%E6%A0%B9%E7%A6%BB%E5%AD%90%E7%9A%84%E7%89%A9%E8%B4%A8%E7%9A%84%E9%87%8F%E6%B5%93%E5%BA%A6%E4%B8%BA%3FA+%EF%BC%88125%2F9%EF%BC%89%C3%97+a%2FV+mol%2FLb+%EF%BC%88125%2F18%EF%BC%89%C3%97+a%2FV+mol%2FLc+%EF%BC%88125%2F36%EF%BC%89%C3%97+a%2FV+mol%2FLd+%EF%BC%88125%2F54%EF%BC%89%C3%97+a%2FV+mol%2FL)
VmLAl2(SO4)3溶液中含Al3+ a g,取V/4mL溶液稀释到4VmL,则稀释后溶液中硫酸根离子的物质的量浓度为?A (125/9)× a/V mol/Lb (125/18)× a/V mol/Lc (125/36)× a/V mol/Ld (125/54)× a/V mol/L
VmLAl2(SO4)3溶液中含Al3+ a g,取V/4mL溶液稀释到4VmL,则稀释后溶液中硫酸根离子的物质的量浓度为?
A (125/9)× a/V mol/L
b (125/18)× a/V mol/L
c (125/36)× a/V mol/L
d (125/54)× a/V mol/L
VmLAl2(SO4)3溶液中含Al3+ a g,取V/4mL溶液稀释到4VmL,则稀释后溶液中硫酸根离子的物质的量浓度为?A (125/9)× a/V mol/Lb (125/18)× a/V mol/Lc (125/36)× a/V mol/Ld (125/54)× a/V mol/L
n(AL3+)=a/27mol
n(SO42-)=a/27/2*3=a/18mol
n`=a/18*(1/4)=a/72mol
c=n/v=a/72mol/(4*0.001)L=(125/36)*a/v mol
选C