Solution concentration?

Question

How would you make a .05% solution of acetic acid from a 100% solution of acetic acid?

Answer 1

You need to specify a volume. I will use 1000ml

The simple equation to use is:

C1V1 = C2V2

0.05*1000 = 100*V2

V2 = 0.05*1000/100

V2 = 0.5

You would take 0.5ml of the concentrated acid at 100% concentration and dilute to 1000ml with water. This is 00.05%solution

Answer 2

The % concentration is inversely proportional to the volume. This means doubling the volume reduces the concentration to 1/2.

0.05 % / 100 % = 1/20,000

You'll need 1 part of the 100 % acetic acid and 19,999 parts of water.

Suppose you want to make 1,000 mL of the 0.05 % acetic acid. The dilution equation is:

C1V1 = C2V2

100% x V1 = 0.05 % x 1,000 mL

V1 = 0.05 x 1,000 mL / 100 = 0.50 mL

You would need 0.50 mL of the 100 % acetic acid and 999.50 mL of water.