Dilution Calculation

Question

What volume of 2.0M HCl is needed to prepare 0.50L of a 0.75M solution?

Answer 1

The equation for dilutions is M1V1=M2V2. You are given the following variables:

M1 (initial molarity)= 2.0 M

V1= not given

M2(final molarity)= .75 M

V2(final volume)=.50L

Plugging that into the equation gives (2.0)V2=(.75)(.50). Solving for the unknown variable gives V2=(.75)(.50)/(2.0)=.1875 L and the answer should be rounded to 2 sig figs so it would be .19 L as the final answer