What is the final volume of NaOH solution prepared from 200.0mL of 0.500M NaOH if you wanted the final concentration to be 0.200M ?

Answer 1

M1V1=M2V2
(200)(0.500)=(.200)x
x=500 mL

Answer 2

M1 is actually 0.5 and V1 is 200! My mistake there.