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

Answer 1

Wyatt Atkins

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.

For example, we should add 150 milliliters (1.5 times) of water to every 100 milliliters of 5% acetic acid.

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

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Answer 2

Peyton Adams

To prepare 2% acetic acid from 5% acetic acid, you need to dilute it. You can use the formula:

C1V1 = C2V2

Where: C1 = concentration of the initial solution (5%) V1 = volume of the initial solution (unknown) C2 = desired concentration (2%) V2 = final volume of the diluted solution (unknown)

Rearranging the formula to solve for V1:

V1 = (C2 * V2) / C1

Substituting the values:

V1 = (2% * V2) / 5%

V1 = (2/100 * V2) / (5/100)

V1 = (2/5) * V2

So, to prepare 2% acetic acid from 5% acetic acid, you need to mix 2 parts of the 5% solution with 3 parts of water.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.