Calculate the concentration of a solution made by diluting 82.0 mL of 5.7 M HBr to a final volume of 675.0 mL.

Answer 1

You can use V1M2 = V2M2

V1 = initial volume = 82.0 ml

M1 = initial molarity = 5.7 M

V2 = final volume = 675.0 ml

M2 = final molarity = ?

(82.0 ml)(5.7 M) = (675.0 ml)(x M)

x = 0.692 M (to 3 significant digits)

Answer 2

0.692M (0.00692 moles)