溶液稀释的计算 如何计算稀释溶液的浓度??
\u6eb6\u6db2\u7a00\u91ca\u6d53\u5ea6\u8ba1\u7b97\u516c\u5f0f\u8ba1\u7b97\u7a00\u91ca\u6eb6\u6db2\u7684\u6d53\u5ea6\u7684\u516c\u5f0f\uff1a
V1\u00d7M1 = V2\u00d7M2
V =V2 -V1
V1 = \u7a00\u91ca\u524d\u4f53\u79efn
V2 = \u7a00\u91ca\u540e\u4f53\u79ef
M1 = \u524d\u7a00\u91ca\u6d53\u5ea6
M2 =\u7a00\u91ca\u540e\u6d53\u5ea6
V = \u5408\u8ba1\u6eb6\u5242\u7a00\u91ca
\u5177\u4f53\u7684\u6eb6\u6db2\u7684\u53d8\u5316\u8fc7\u7a0b\u5982\u4e0b\uff1a
(1)\u53d65ml\u7684\u6eb6\u6db2\u52a0\u6c34\u7a00\u91ca\u523025ml
1000\u03bcg/ml * 5ml / 25ml = 200\u03bcg/ml
(2)\u518d\u7531(1)\u53d620ml\u7a00\u91ca\u523025ml
200\u03bcg/ml * 20ml / 25ml = 160\u03bcg/ml
(3)\u518d\u7531(2 )\u53d620ml\u7a00\u91ca\u523025ml
160\u03bcg/ml * 20ml / 25ml = 128\u03bcg/ml
(4)\u518d\u7531(3 )\u53d612.5ml\u7a00\u91ca\u523025ml
128\u03bcg/ml * 12.5ml / 25ml = 64\u03bcg/ml
(5) \u518d\u7531(4)\u53d62ml\u7a00\u91ca\u523010ml
64\u03bcg/ml * 2ml / 10ml = 12.8\u03bcg/ml
(6) \u7531(5)\u53d65ml\u7684\u6eb6\u6db2\u52a0\u6c34\u7a00\u91ca\u523025ml
12.8\u03bcg/ml * 5ml / 25ml = 2.56\u03bcg/ml
(7) \u7531(6)\u53d620ml\u7a00\u91ca\u523025ml
2.56\u03bcg/ml * 20ml / 25ml = 2.048\u03bcg/ml
(8) \u7531(7 )\u53d620ml\u7a00\u91ca\u523025ml
2.048\u03bcg/ml * 20ml / 25ml = 1.6384\u03bcg/ml
(9) \u7531(8 )\u53d612.5ml\u7a00\u91ca\u523025ml
1.6384\u03bcg/ml * 12.5ml / 25ml = 0.8192\u03bcg/ml
\u6269\u5c55\u8d44\u6599\uff1a
\u5173\u4e8e\u6eb6\u6db2\u6469\u5c14\u6d53\u5ea6\u7684\u8ba1\u7b97\uff1a
1\u3001\u5df2\u77e5\u6eb6\u8d28\u7684\u8d28\u91cfm\uff0c\u548c\u6eb6\u6db2\u7684\u4f53\u79efV\uff0c\u5047\u8bbe\u6eb6\u8d28\u7684\u6469\u5c14\u8d28\u91cf\u4e3aM\uff0c\u6eb6\u8d28\u7684\u6469\u5c14\u6d53\u5ea6\u4e3ac=m/MV
2\u3001\u5df2\u77e5\u6eb6\u8d28\u7684\u7269\u8d28\u7684\u91cfn\uff0c\u548c\u6eb6\u6db2\u7684\u4f53\u79efV\uff0c \u6eb6\u8d28\u7684\u6469\u5c14\u6d53\u5ea6\u4e3ac=n/V
3\u3001\u5df2\u77e5\u6eb6\u8d28\u7684\u8d28\u91cf\u5206\u6570w\uff0c\u548c\u6eb6\u6db2\u7684\u5bc6\u5ea6p\uff0c\u6eb6\u8d28\u7684\u6469\u5c14\u8d28\u91cf\u4e3aM \u6eb6\u8d28\u7684\u6469\u5c14\u6d53\u5ea6\u4e3ac=1000pw/M
4\u3001\u5df2\u77e5\u6eb6\u6db2\u7684\u8d28\u91cfm\uff0c\u548c\u6eb6\u6db2\u7684\u4f53\u79efV\uff0c\u6eb6\u6db2\u7684\u5bc6\u5ea6w \u6eb6\u8d28\u7684\u6469\u5c14\u6d53\u5ea6\u4e3ac=1000mw/MV
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u7a00\u91ca\u5b9a\u5f8b
原来是10毫升，那么把这10毫升变成100毫升，就是稀释10倍了。加90毫升水，总量变成100毫升就行了。
当然，条件必需是这种有机物是溶于水的。否则就不能加水，要加某种有机溶剂。
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