InterviewSolution
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InterviewSolution
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In a solution total concentration of `M^(3+)` is `2xx10^(-3) (M)` and total concentration of `SCN^(-)` is `1.51xx10^(-3) (M)` and free `SCN^(-)` concentration `= 1xx10^(-5) (M)` What is the dissociation constant of the complex `M(SCN)^(2+)`?A. `2xx10^(5)`B. `2xx10^(-5)`C. `3.33xx10^(5)`D. `3.33xx10^(-6)` |
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Answer» Correct Answer - D `underset(50xx10^(-5))(M^(3+))+underset(10-5)(SCN^(-))overset(K_(form))underset(larr)(rarr)underset(150xx10^(-5))(M(SCN)^(2+))` `K_(form)=(150xx10^(-5))/(50xx10^(-5)xx10^(-5))=3xx105` `K_(disso)=(1)/(K_(form))=(1)/(3)xx10^(-5)` `=(10)/(3)xx10^(-6)=3.33xx10^(-5)` |
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