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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: seerrah_ on April 12, 2019, 03:33:04 PM

Title: Calculate amount of acid needed in a solution to lower pH
Post by: seerrah_ 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!! :)
Title: Re: Calculate amount of acid needed in a solution to lower pH
Post by: chenbeier on April 13, 2019, 06:18:41 AM
Do you know the Henderson-Hasselbalch equation?
Title: Re: Calculate amount of acid needed in a solution to lower pH
Post by: seerrah_ 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!)
Title: Re: Calculate amount of acid needed in a solution to lower pH
Post by: Borek on April 13, 2019, 05:58:45 PM
Please don't cross post.

Locked here.

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