Question

Concentrated hydrochloric acid is 12.0 M. What volume of this concentrated

solution would be needed to mix with water to produce 100. mL of 5.0 M. (Hint: the
number of moles in the diluted solution must be the same as the number of moles
from the concentrated solution.)

Answer 1

41.67 ml HCl

Step-by-step explanation:

n = M x V

Since the number of moles is the same:

M1 x V1 = M2 x V2

V1 = M2 x V2 /M1 =(0.1 L x 5.0 M) / 12.0 M = 0.041667 L = 41.67 ml