Chemical Kinetics — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryChemical Kinetics3 Marks
Question
Give examples of rate law with illustrations.
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Answer
Consider following examples: $\begin{aligned} & \text {(i) } H _{2( g )}+ I _{2( g )} \rightarrow 2 HI _{( g )} \\ & R = k \left[ H _2\right]\left[ I _2\right] \end{aligned}$
(ii) $2 H _2 O _{2( g )} \rightarrow 2 H _2 O _{( l )}+ O _{2( g )}$ Experimentally it is observed that the rate of the reaction is proportional to the concentration of $H _2 O _2$ $\therefore R = k \left[ H _2 O _2\right]$
(iii) $NO _{2( g )}+ CO _{( g )} \rightarrow NO _{( g )}+ CO _{2( g )}$ Experimentally it is observed that rate of the reaction does not depend on the concentration of CO but it is proportional to $\left[ NO _2\right]^2$. $\therefore R = k \left[ NO _2\right]^2$
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