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Add 2 parts acetic acid 5% (5 acetic acid or household vinegar) to 3 parts water (or sterile water for irrigation depending ont he need) and you will render 2% acetic acid.

parts are whatever volume you want.

i.e. if you need 50ml of 2 acetic acid; use 20ml of 5% acetic acid and 30ml of water.

or you can set up the allogation method as below.

Say you nee 50ml of 2% acetic acid and all you have is 5% acetic acid you do the following with a tick tack toe :

To get the 3 parts you take the 5 at the bottom and subtract across the middle (2 percent desired) and the difference is 3. To get the bottom right answer (2parts) you take the difference of zero from 2 and the diff is 2.

0% (water) - - 3 (parts water)

- 2% (desired) -

5% (AA) - - 2 (parts 5% AA)

with a total of 5 parts (3 parts water and 2 parts AA) you multiple your desired amount versus the fraction of parts for each.

example 3 parts water divided by 5 total parts equals 60% times 50ml equals 30ml.

2 parts 5% AA divided by 5 total parts eqauls 40% times 50ml equals 20ml.

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13y ago

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