Polyprotic acid question 2.0

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chloewinnett1L
Posts: 55
Joined: Fri Sep 28, 2018 12:20 am

Polyprotic acid question 2.0

Postby chloewinnett1L » Sun Feb 10, 2019 9:06 pm

When can you ignore the second deprotonation of a polyprotic acid? In the solutions manual it says you can ignore when Ka2 is significantly less than Ka1, but how much is "<<"?

armintaheri
Posts: 68
Joined: Fri Sep 28, 2018 12:26 am

Re: Polyprotic acid question 2.0

Postby armintaheri » Sun Feb 10, 2019 11:55 pm

I think the general rule is that you can ignore the second deprotonation if Ka2 is smaller than Ka1/1000.


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