Deprotonation
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Re: Deprotonation
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.
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Re: Deprotonation
Because the Ka for the second deprotonation is very small, it doesn't have a substantial effect on pH.
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Re: Deprotonation
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.
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