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[" The dissociation constant of "HCN" is...

[" The dissociation constant of "HCN" is "5times10^(-10)" .The "],[pH" of the solution prepared by mixing "1.5mole" of "],[HCN" and "0.15moles" of "KCN" in water and making "],[" up the total volume to "0.5dm^(3)" is: "],[[" a) "7.302," b) "9.302," c) "8.302," d) "10.302]]

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The dissociation constant of HCN is 5 xx 10^(-10) . The pH of the solution prepared by mixing 1.5 mole of HCN and 0.15 moles of KCN in water and making up the total volume to 0.5 dm^(3) is

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