posted by MaryBeth .
What volume of a 3.70 M KI stock solution would you use to make 0.400 L of a 1.25 M KI solution?
You want to dilute it 3.7/1.25 or 2.96 times?
so add one part stock solution, 1.96 parts of water.
what is one part? .400L/2.96=135ml