January 23, 2020, 05:23:48 PM
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### Topic: Calculate amount of acid needed in a solution to lower pH  (Read 466 times)

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#### 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!!

#### 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?

#### 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 »
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!)

#### 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 »