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Calculate the pK values of the following...

Calculate the pK values of the following organic acids and bases from their given K constants:
(a) `CH_(3)COOH,K_(a)=1.8xx10^(-5)`
(b) `CH_(3)OH,K_(a)=3.1xx10^(-16)`
(c) `CH_(3)NH_(2),K_(b)=4.5xx10^(-4)`

Text Solution

Verified by Experts

(a) `pK_(a)=-"log"(1.8xx10^(-5))=5-0.255=4.745`
(b) `pK_(a)=-"log"(3.1xx10^(-16))=16-0.491=15.509`
(c) `pK_(b)=-"log"(4.5xx10^(-4))=4-0.653=3.347`
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