From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
$(ii)$ $H _{2} O _{2}( aq )+3 I ^{-}( aq )+2 H ^{+} \rightarrow 2 H _{2} O ( l )+ I _{3}^{-} \quad$ Rate $=k\left[ H _{2} O _{2}\right][ I ]$
From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
$(ii)$ $H _{2} O _{2}( aq )+3 I ^{-}( aq )+2 H ^{+} \rightarrow 2 H _{2} O ( l )+ I _{3}^{-} \quad$ Rate $=k\left[ H _{2} O _{2}\right][ I ]$
$(ii)$ Given rate $=k\left[ H _{2} O _{2}\right]\left[ I ^{-}\right]$
Therefore, order of the reaction $=2$
Dimension of $k=\frac{\text { Rate }}{\left[ H _{2} O _{2}\right]\left[ I ^{-}\right]}$
$=\frac{ mol \,L ^{-1}\, s ^{-1}}{\left( mol \,L ^{-1}\right)\left( mol\, L ^{-1}\right)}$
$= L \,mol ^{-1}\, s ^{-1}$
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