What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?

Answer 1

c1v1 = c2v2
2.5*v1 = 0.50*100
Solve for v1.

Answer 2

Mconcentrated*Vconcentrated = Mdilute*Vdilute.