Question

If a solution has 17.2 moles of LiF in 2000 mL of water, what is the molarity?

4.2 M

10 M

2 M

8.6 M

Answer 1

Molarity, M = (n x 1000) / vol (in ml)

M = 17.2 x 1000/ 2000

M = 8.6 mol/L