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Deprotonation

Posted: Mon Jan 20, 2020 9:01 pm
by Ryan Chang 1C
Why do we typically disregard the second deprotonation of polyprotic acids?

Re: Deprotonation

Posted: Mon Jan 20, 2020 9:15 pm
by EvanWang
Typically the Ka for the second deprotonation is extremely small. Apart from sulfuric acid, for most acids it doesn't have a meaningful effect on pH.

Re: Deprotonation

Posted: Mon Jan 20, 2020 9:34 pm
by Aarushi Solanki 4F
Because the Ka for the second deprotonation is very small, it doesn't have a substantial effect on pH.

Re: Deprotonation

Posted: Mon Jan 20, 2020 10:01 pm
by Hannah Romeo 1J
For polyphonic acids, only the first Ka is significant as the removal of the first hydrogen results in the biggest change in pH. Each succeeding removal of hydrogen does not have as much effect on the pH.