Diluting Solutions to Prepare Workable Solutions

We should make solutions of any concentrration from a more concentrated source.

We can make it by a simple equation.

M1V1 = M2V2

Example 1 :

Theres a 40.0mL of 0.400M NaOH solution is diluted to a final volume of 200.0mL, calculate the new concentration.

Let x be the new concentration.

0.400 x 40.0/1000.0 = 100/1000x

                             x= 6.25

The new concentration is 6.25M

Example 2 :

A 0.700M solution is concentrated by evaporation to a reduced final volume of 200.0mL and a molarity of 1.65M. Calculate the original volume.

Let V be the original volume.

0.700V = 200/1000 x 1.65

        V = 2.33
The original volume was 2.33L