How much water should we add to prepare #2%# acetic acid from #5%# acetic acid?

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Answer 1 · 2017-04-10T06:44:34

To prepare 2% acetic acid from #5%# acetic acid, we must add one and a half times water.

#5%# acetic acid contains

#5# units of acetic acid in #100# units of water

for #2%# of acetic acid we need

#2# units of acetic acid in #100# units of water

or #5# units of acetic acid in #100/2xx5=250# units of water.

i.e. in each #100ml# of #5%# acetic acid we should add #150ml# of water i.e. one and a half times water

Hence, to prepare 2% acetic acid from #5%# acetic acid, we must add one and a half times water.