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(i) State law of mass action. (ii) For...

(i) State law of mass action.
(ii) For the reaction `N_(2)+3H_(2)hArr 2NH_(3)` equilibrium constant is `K_(1)` and that of for the reaction `NH_(3)hArr (1)/(2)N_(2)+(3)/(2)H_(2)` is `K_(2)`. Then calculate the relation between `K_(1) and K_(2)`.
(iii) Calculate the pH of 0.01 (M) `CH_(3)COOH` at `25^(@)C`. `(K_(a)" of "CH_(3)COOH=1.75xx10^(-5))`.

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