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  • For a certain reaction, the rate  , when the initial concentration of A is tripled kee

For a certain reaction, the rate =k[A]^2[B] , when the initial concentration of A is tripled keeping concentration of B constant, the initial rate would
 

Option: 1

decrease by a factor of nine.
 


Option: 2

increase by a factor of six.
 


Option: 3

increase by a factor of nine
 


Option: 4

increase by a factor of three


Answers (1)

best_answer

$$ \begin{aligned} & r=K[A]^2[B] \\ & r \propto[A]^2, \text { if }[B] \text { remains constant } \\ & r_f \propto[3 A]^2 \\ & r_f \propto 9 \times[A]^2 \propto 9 \times r_i \end{aligned}

So, rate will increase 9 times of initial rate.

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Sayak

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