How would you prepare a 05 mL of a 2 vv solution of DMSO in

How would you prepare a 0.5 mL of a 2% (v/v) solution of DMSO in SAU medium?

Solution

concentration of solution = 2 % (v /v)

2 mL in ------------> 100 mL solution

0.5 mL   --------------> ??

volume of solution = 0.5 x 100 / 2 = 25 mL

to prepare 0.5 mL adding 23 mL of water to 2 % (v/v) solution.