How many milliliters of 10.0M HF must be diluted to 500. ml to make a 2.00M solution?

Question

How many milliliters of 10.0M HF must be diluted to 500. ml to make a 2.00M solution?

Answer 1

V1M1 = V2M2

V1 = volume needed = ?

M1 = initial molarity = 10.0 M HF

V2 = final volume = 500. ml

M2 = final molarity = 2.00 M

(V1)(10.0) = (500. ml)(2.00 M)

V1 = 100. mls needed (3 sig.figs.)