Posted by vivek on Thursday, February 24, 2011 at 11:15am.
Hmmm. mM? is that milliMolar?
If so, you are diluting it 1/.025 times, or 40 times, so you need 1 part stock, 39 parts water.
1/40 th of 10 ml is 10ml/40= .25ml stock
check my thinking
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