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ADITYA SUBRAMANIAN Grade: 11
        

 










a first order parallel reaction given as"a-----b and c .given that k1 is rate constant for formation of b and k2 is rate constant for c.k1=1.3 * 10 to power -5 ,sec to power -1.also k1\k2=1\9.find conc.ratio of c to a if an experiment is allowed to start with only a for 1 hr. I HAVE ALREADY ASKED ANS.FOR THIS Q.THE ANS GIVEN IS 0.537.THE ANSWER U GAVE IS 9/11.PLZ GIVE ME A RIGHT SOLUTION.


 




 

7 years ago

Answers : (1)

askiitian.expert- chandra sekhar
10 Points
										

Hi Aditya,



Hi,


A---->B     k1


A---->C     k2


d[B]/dt = k1*[A]      d[B] = k1*[A] dt


d[C]/dt = k2*[A]      d[C] = k2*[A] dt


therefore [B]/[C] = k1/k2 = 1/9


[A]0 = [A]+[B]+[C]


[A]=[A]0e-(k1+k2)t



[A]=[A]0e-0.468


[A]0 = [A]e0.468


[A]0 = [A]+[B]+[C]


[A]e0.468= [A]+[B]+[C]


[A]*1.656= [A]+[B]+[C]


[A]*0.656=[B]+[C]


0.656*[A]/[C] = [B]/[C] + 1 = 1/9 +1 = 11/9


[C]/[A]=0.656*9/11=0.537



7 years ago
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