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posted by  Yamen on 11/21/2008 8:17:24 PM  |  status: Live  

acids and bases problem

Course Textbook Chapter Problem
General Chemistry Chemistry (9th) by Chang 15 N/A
Question Details:
The value of the ionization constant for hydrocyanic acid, HCN, is (4.0 x 10^-10).
a; write the equation for the reaction of the base CN^- with water?
b; what is the value of Kb for the cyanide ion, CN^_ ?
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posted by CHEMNATION! on 11/21/2008 10:06:28 PM  |  status: Live
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Response Details:
CN-(aq) + H2O(l) ---> HCN(aq) + OH-(aq)
 
Kb = Kw/Ka = 1E-14 / 4.0E-10 = 0.25 E-4 = 2.5E-5
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