How do we prepare 500mL of 0.5 percent w/v solution of NaOH if we have stock solution of 50 percent w/v NaOH on hand?

Answer 1

c1v1 = c2v2
50*?mL = 0.5 x 500 mL
Solve for ?mL. Add ?ml stock to a 500 mL volumetric flask and make to the mark.