The conversion of molecules $X$ to $Y$ follows second order kinetics. If concentration of $X$ is increased to three times how will it affect the rate of formation of $Y ?$

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The reaction $x \rightarrow Y$ follows second order kinetics.

Therefore, the rate equation for this reaction will be:

Rate $=k[X]^{2}(1)$

Let $[X]=a$ $mol$ $L^{-1},$ then equation $(1)$ can be written as:

$Rate_{1}=k \cdot(a)^{2}$

$=k a^{2}$

If the concentration of $X$ is increased to three times, then $[X]=3 \,a$ $mol$ $L^{-1}$

Now, the rate equation will be:

Rate $=k(3 a)^{2}$

$=9\left(k a^{2}\right)$

Hence, the rate of formation will increase by $9$ times.

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