Question

A stock solution of 5 M sodium acetate has been made. You want to make a 50 ml 0.33 M sodium acetate solution for your lab bench. How much of the stock solution and water do you need? (ml)

Answer 1

concentration of stock M1= 5 M

concentration needed M2= 0.33 M

the volume of the stock needed V1=?

final volume V2=50 mL

M1V1=M2V2

V1=M2V2/M1

=0.33 50/ 5

= 3.3 mL

so volume of the stock required= 3.3 mL

volume of water required= 50-3.3=46.7 mL