How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

Answer 1

You want to dilute it 2M/.150= 13 1/3 times. So you want one part stock solution, the remainder water.

1part= 250/(13.3333)=18.75ml 2M stock solution.
fill up the remainder with water, stir and label. (remainder= 12.33333x18.75, but there is no need to measure it, just fill to the 250ml mark).

check my thinking.