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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: dhragon on September 23, 2010, 08:57:59 AM

Title: Titration curve question
Post by: dhragon on September 23, 2010, 08:57:59 AM

Hi everyone,

For a weak acid whose pKa is 4.2, how do I find what the pH is at the point on the titration curve where the ratio of salt (A-) to acid (HA) is 2:1 ?

Thanks for your *delete me*

Title: Re: Titration curve question
Post by: Borek on September 23, 2010, 02:18:16 PM

Henderson-Hasselbalch equation (http://www.chembuddy.com/?left=pH-calculation&right=pH-buffers-henderson-hasselbalch)

Title: Re: Titration curve question
Post by: dhragon on September 23, 2010, 03:48:57 PM

Thanks for the reply!

Would [A-] be 2 and [HA] be 1 for this problem?