InterviewSolution
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InterviewSolution
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Equimolar concentrations of `H_(2)` and `I_(2)` are heated to equilibrium in a 2 L flask. At equilibrium, the forward and backward rate constants are found to be equal. What percentage of initial concentration of `H_(2)` has reached at equilibrium ?A. 0.33B. 0.66C. `50%`D. 0.4 |
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Answer» Correct Answer - A `{:(,H_(2)(g),+,I_(2)(g),hArr,2HI(g)),("Initial",1 mol,,1 mol,,0),("At eqm.",1-x,,1-x,,2x),("Molar conc.",(1-x)/(2),,(1-x)/(2),,(2x)/(2)mol L^(-1)):}` `K=((2x)^(2))/((1-x)(1-x))=(4x^(2))/((1-x)^(2))` But `k_(f)//k=1impliesk=1 :. (2x)/(1-x)=1 ` or `x=1//3` Percent dissociation `=100//3=33.33%` |
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