October 25, 2021, 05:19:53 PM
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Topic: Problem with finding the equation for a buffer solution  (Read 367 times)

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Offline ryan0927

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Problem with finding the equation for a buffer solution
« on: August 30, 2021, 09:03:31 PM »
An experiment I am planning requires me to prepare an alkaline buffer solution, and I found some sources that said one of 0.1 mol NaHCO3 and 0.1 mol Na2CO3 dissolved in 0.5dm3 distilled water would give a pH value of 9.7. I am not sure how I should find the equilibrium equation for this, as I am not very familiar with such buffers with two salts, as opposed to only one. Thank you in advance for any advice!

Offline Babcock_Hall

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Re: Problem with finding the equation for a buffer solution
« Reply #1 on: August 30, 2021, 09:14:56 PM »
A good general piece of advice is to start by writing a balanced equation.  In this case, I would write an acid dissociation equation.

Offline ryan0927

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Re: Problem with finding the equation for a buffer solution
« Reply #2 on: August 30, 2021, 11:25:44 PM »
A good general piece of advice is to start by writing a balanced equation.  In this case, I would write an acid dissociation equation.

How would you do this if there are two salts, though?

Offline Borek

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Re: Problem with finding the equation for a buffer solution
« Reply #3 on: August 31, 2021, 03:17:21 AM »
Do you understand how buffers work? You need a conjugate pair: acid and a base. What will be the acid, what will be the base in your case?
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