Use the dilution equation, M₁V₁ = M₂V₂

M₁=0.01 M

V₁ = unknown

M₂= 0.001 M

V₂ = 20 mL

Solve equation for V₁

Get 2 mL.  This is the amount of the 0.01 M solution that we need.  The total volume is 20 mL, so we need to add 18 mL of water.

So, measure 2 mL of your 0.01 M solution and add it to 18 mL of water to make a 0.001 M solution.

GOOD JOB!

Back to Main Page...