Posted by **Anonymous** on Tuesday, March 26, 2013 at 7:39pm.

How would you go about making 250ml of a 20X stock solution of NaCl to dilute later to a final concentration of 50mM? I know that the molecular weight of NaCl is 58.44 but I am not sure where to start. I need to figure out the amount of NaCl and water needed. Thank you!

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