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The K_a value for HCN is 10^(-9). What is the pH of decimolar HCN solution ? |
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Answer» SOLUTION :Dissociation constant, `K_a = 10^(-9)`, CONCENTRATION, `C=0.1 = 1 XX 10^(-3) mol L^(-1)` `[H^+]= sqrt(K_aC) = sqrt(10^(-9) xx10^(-1) = 10^(-5)) mol L^(-1)` pHof thesolution`pH=-log 10^(-5) = 5` |
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