Unformatted text preview: You also have a large
supply of deionized water available.
Using the pipet, take 10.00 mL of the stock solution and dilute this to 100 mL in
the volumetric flask. This 10-fold dilution results in a solution that is 5.00 ppm
Pour about 20 mL of this dilute solution into the beaker and clean the volumetric
flask. Take 15.00 mL of this solution and dilute to 100 mL in the volumetric flask.
This results in a 0.75 ppm Mg2+(aq) solution.
Recall, C1V1 = C2V2 (where C is the solution concentration). For the second
dilution, (5 ppm)V1 = (0.75 ppm)(100 mL) and V1 = 15 mL.
Note that other dilution schemes could be used....
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- Fall '13