Consider the reaction : `{:(,P(g)+,2Q(g)overset(K_(C )=10^(12))hArr,R(g)+,S(g)),("Initial conc.",2M,4M,0,0):}` then select correct statement(s)
A
At equilibrium `[R(g)]=[S(g)]~=2M`
B
At equilibrium `[P(g)]=[Q(g)]~=10^(-4)M`
C
At equilibrium `[P(g)]~=10^(-4)M`
D
At equilibrium `[Q(g)]~=2xx10^(-4)M`
Text Solution
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The correct Answer is:
A, C, D
Consider the reaction …………… `{:(,P(g)+,2Q(g)hArr,R(g)+S(g),K_(c )=10^(12)),("Initial conc.", 2M,4M,0,0),("at equilibrium", x,2x,2M,2M),("conc.", ,(xrarr0), ,"Since"K_(c )"it very large"):}` reaction will almost take place to completion. `K_(c )=10^(12) = ((2)(2))/(x(2x)^(2)) implies x = 10^(-4)M` `[P(g)]_(eq) = 10^(4)M` `[Q(g)]_(eq)=2xx10^(-4)M` `[R(g)]=[S(g)=2M`
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