Sapling #7

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805377003
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Sapling #7

Postby 805377003 » Sat Jan 23, 2021 4:25 pm

The Kb for an amine is 4.352×10−5. What percentage of the amine is protonated if the pH of a solution of the amine is 9.258 ? Assume that all OH− came from the reaction of B with H2O.

Can someone explain this?

Peter DePaul 1E
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Joined: Wed Sep 30, 2020 9:55 pm
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Re: Sapling #7

Postby Peter DePaul 1E » Sat Jan 23, 2021 4:58 pm

So we're dealing with the equilibrium of . Therefore . We know from the pH the pOH = 14 - 9.258 = 4.742, therefore we can determine . We also know . Now we know that . Percent protonated = protonated.


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