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Topic: Calculate amount of acid needed in a solution to lower pH  (Read 1951 times)

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Offline seerrah_

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Calculate amount of acid needed in a solution to lower pH
« on: April 12, 2019, 03:33:04 PM »
Hi,

I can't figure out the following problem..

When a 30mM (aq) solution of sodium acetate was prepared in the lab, it had a pH of 8.8. Calculate the amount of acetic acid (in grammes) to be added to 0.5L of this sodium acetate solution in order to bring the pH to the target value of 5.00.

Any help would be greatly appreciated!! :)
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Offline chenbeier

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Re: Calculate amount of acid needed in a solution to lower pH
« Reply #1 on: April 13, 2019, 06:18:41 AM »
Do you know the Henderson-Hasselbalch equation?
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Offline seerrah_

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Re: Calculate amount of acid needed in a solution to lower pH
« Reply #2 on: April 13, 2019, 12:52:05 PM »
Quote from: chenbeier on April 13, 2019, 06:18:41 AM
Do you know the Henderson-Hasselbalch equation?

Yes I do, I’m just confused how to apply it to this question? (not v. good at chemistry!)
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Offline Borek

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Re: Calculate amount of acid needed in a solution to lower pH
« Reply #3 on: April 13, 2019, 05:58:45 PM »
Please don't cross post.

Locked here.

Discussion continues here: https://www.chemicalforums.com/index.php?topic=99626.0
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