The Kb for an amine is 1.186×10−5. What percentage of the amine is protonated if the pH of a solution of the amine is 9.880 ? Assume that all OH− came from the reaction of B with H2O.
When finding the % of amine protonated, why do we divide the concentration of BH+ by the formal concentration of B rather than the initial concentration of B?
Achieve Week 2 #5
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Aditya Desai 1A
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Irene Kim 3E
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Re: Achieve Week 2 #5
The formal concentration is the sum of the concentrations of B and BH+. This is because we need to take both reactants into consideration when solving for the percentage of anime that is protonated.
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Lily Rivas 1H
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Re: Achieve Week 2 #5
To add on to the previous post BH+ acts as the portion of the amine that is protonated and B acts as the portion of the anime that isn't protonated.
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