Calculate the final concentration, M

Question

Calculate the final concentration(M) of each dilution:

dilution A: 5.00 mL stock solution (1.00mM)

dilution B: 5.00 mL of dilution A

dilution C: 5.00 mL of dilution B

dilution D: 5.00 of dilution C

Final volume, mL

dilution A: 50.00 mL

dilution B: 25.00 mL

dilution C: 25.00 mL

dilution D: 10.00 mL

Final concentration, M

dilution A: ?

dilution B:?

Dilution C:?

dilution D:?

Answer 1

You can use V1M1 = V2M2 for these dilution problems, where V1 is initial volume, M1 is initial concentration, V2 is final volume and M2 is final concentration.

A. (5.00 ml)(1.00 mM) = (50.00 ml)(x mM) and x = 0.100 mM = 1.00x10^-4 M

B. (5.00 ml)(1x10^-4 M) = (25.00 ml)(x M) and x = 2.00x10^-5 M

C. (5.00 ml)(2.00x10^-5 M) = (25.00 ml)(x M) and x = 4.00x10^-6 M

D. (5.00 ml)(4.00x10^-6 M) = (10.00 ml)(x M) and x = 2.00x10^-6 M