posted by Debbie .
Describe how you would prepare 10 mL each of 2 M, 1.5 M, and 1 M NaCl solutions from a 2 M stock NaCl solution. Describe your actions–exactly what you woulddo–step-by-step–when preparing thissolution. Also show all calculations. Be sure all amounts include un
For 2M it should be obvious that you add 2M stock soln slowly until it reaches the mark of a 10 mL volumeric flask.
Here is how you do the 1M.
mL1 x M1 = mL2 x M2
10 x 1.0 = mL2 x 2
mL2 = (10 x 1/2) = 5 mL.
Using a 5.0 mL pipet, transfer 5.0 mL of the 2M stock solution to a 10 mL volumetric flask, then add water to the mark. Stopper and mix thoroughly.