6B.9 (7th edition)

Acidity
Basicity
The Conjugate Seesaw

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005199302
Posts: 108
Joined: Fri Sep 28, 2018 12:15 am

6B.9 (7th edition)

Postby 005199302 » Thu Jan 17, 2019 9:49 pm

For this question, why can't we use [H30+][OH-]=10^-14 for the concentration of H30+ in (ii)?
When I try to use it, I get [H30+]=6.67x10^-15 so I know it's wrong.

Samantha Hoegl Roy 2C
Posts: 81
Joined: Fri Sep 28, 2018 12:15 am

Re: 6B.9 (7th edition)

Postby Samantha Hoegl Roy 2C » Sat Jan 19, 2019 8:18 pm

For ii) I just calculated the pOH: -log(1.5) = 0.176
14 - pOH = pH thus the pH is 13.824. to find the H3o+ concentration i did 10^-13.824, which gives you 1.499 x 10^-14


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