Question

What is the final volume of NaOH solution prepared from 250.0mL of 0.800M NaOH if you wanted the final concentration to be 0.200M

Answer 1

c1v1 = c2v2
c = concn
v = volume

250 mL x 0.800M = mL x 0.200M
Solve for mL

Answer 2

1000