Question

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???
不太懂???
可以代进去，试算给我看吗?

Answer 1

计算稀释溶液的浓度的公式：

V1×M1 = V2×M2

V =V2 -V1

V1 = 稀释前体积n 

V2 = 稀释后体积

M1 = 前稀释浓度

M2 =稀释后浓度

V = 合计溶剂稀释

具体的溶液的变化过程如下： 

(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

扩展资料：

关于溶液摩尔浓度的计算：

1、已知溶质的质量m，和溶液的体积V，假设溶质的摩尔质量为M，溶质的摩尔浓度为c=m/MV 

2、已知溶质的物质的量n，和溶液的体积V， 溶质的摩尔浓度为c=n/V 

3、已知溶质的质量分数w，和溶液的密度p，溶质的摩尔质量为M 溶质的摩尔浓度为c=1000pw/M

4、已知溶液的质量m，和溶液的体积V，溶液的密度w 溶质的摩尔浓度为c=1000mw/MV

参考资料来源：百度百科-稀释定律

Answer 2

计算稀释溶液的浓度的公式：
V1×M1 = V2×M2
V =V2 -V1
V1 = 稀释前体积n
V2 = 稀释后体积
M1 = 前稀释浓度
M2 =稀释后浓度
V = 合计溶剂稀释

具体的溶液的变化过程如下：
(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

Answer 3

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
公式
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。

Answer 4

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

Answer 5

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。