作业帮如何计算稀释溶液的浓度?某溶液的浓度为1000μg/ml(1)取5ml的溶液加水稀释到25ml(2)再由(1)取20ml稀释到25ml (3)再由(2 )取20ml稀释到25ml(4)再由(3 )取12.5ml稀释到25ml(5) 再由(4)取2ml稀释到10ml(6) 由(5)取5m
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如何计算稀释溶液的浓度?
某溶液的浓度为1000μg/ml
(1)取5ml的溶液加水稀释到25ml
(2)再由(1)取20ml稀释到25ml
(3)再由(2 )取20ml稀释到25ml
(4)再由(3 )取12.5ml稀释到25ml
(5) 再由(4)取2ml稀释到10ml
(6) 由(5)取5ml的溶液加水稀释到25ml
(7) 由(6)取20ml稀释到25ml
(8) 由(7 )取20ml稀释到25ml
(9) 由(8 )取12.5ml稀释到25ml
我想要求它每一次稀释过后的浓度
请问要怎麼计算
可以教我吗?
可以代进去，试算给我看吗?
具体的话就是这样:
(1)取5ml的溶液加水稀释到25ml
1000μg/ml * 5ml / 25ml = 200μg/ml
(2)再由(1)取20ml稀释到25ml
200μg/ml * 20ml / 25ml = 160μg/ml
(3)再由(2 )取20ml稀释到25ml
160μg/ml * 20ml / 25ml = 128μg/ml
(4)再由(3 )取12.5ml稀释到25ml
128μg/ml * 12.5ml / 25ml = 64μg/ml
(5) 再由(4)取2ml稀释到10ml
64μg/ml * 2ml / 10ml = 12.8μg/ml
(6) 由(5)取5ml的溶液加水稀释到25ml
12.8μg/ml * 5ml / 25ml = 2.56μg/ml
(7) 由(6)取20ml稀释到25ml
2.56μg/ml * 20ml / 25ml = 2.048μg/ml
(8) 由(7 )取20ml稀释到25ml
2.048μg/ml * 20ml / 25ml = 1.6384μg/ml
(9) 由(8 )取12.5ml稀释到25ml
1.6384μg/ml * 12.5ml / 25ml = 0.8192μg/ml
C*V1/V
C:稀释前浓度，V1取出的体积，V 稀释后的总体积。
根据C1V1=C2V2计算，C1和V1分别是原溶液的浓度和体积，C2和V2分别是稀释后溶液的浓度和体积 。
如（1）1000*5=C2*25，C2=200（μg/ml ）
其他都只要代进去计算就是了。