A student is asked to prepare 400.0 ml of a 0.25 m HCl solution. the students find a bottle labeled 2.0 m HCl. how many ml of the 2.0 m solution are needed to prepare the 0.25 m solution?
a. 25 ml
b. 3.0 x 10¹ ml
c. 5.0 x 10¹ ml
d. 2.0 x 10² ml