Question

1. Jamie made 2.0 liters of a 1.25 M calcium chloride solution to be used for later experiments. For those experiments how should Jamie make up 500.0 ml of a 0.025 M solution?

Answer 1

according to dilution law

M1V1 =M2V2

M1 = 1.25 M , V1 = ?

M2 = 0.025 M , V2 = 500.0 mL

V1 = (M2V2 / M1)

V1 = (0.025 x 500 / 1.25)

V1 = 10.0 mL

take 10.0 mL 1.25 M solution in 500 mL flask. then add water up to the mark.