How much of a stock solution of 10.0 mg/L phosphate standard, do you need to use to make a final solution containing a volume of 3 mL and 5.3 mg/L phosphate?

Question

Enter your numerical answer to one decimal place, the units are assumed to be milliliters.

Answer 1

V1C1 = V2C2

V1 = initial volume = ?

C1 = initial concentration = 10.0 mg/L

V2 = final volume = 3 ml

C2 = final concentration = 5.3 mg/L

(V1)(10.0 mg/L) = (3 ml)(5.3 mg/L)

V1 = (3)(5.3) / 10

V1 = 1.59 mls = 1.6 mls