Posted by **John** on Wednesday, March 27, 2013 at 2:08am.

You need 3.5L of 50mM NaCl from your 20X stock. How would you accomplish this:

20X stock __________ml

Pure Water ___________ml

From whatever number I plugged in trying to solve it, I got: 175ml of 20X stock and 3,430ml of Pure Water. Have no idea if those are right. Any help is appreciated.

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