Question

From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.

H₂O₂ (aq) + 3 I⁻ (aq) + 2 H⁺ → 2 H₂O (l) + `I_3^-` Rate = k[H₂O₂][I⁻]

Answer 1

Given rate = k [H₂O₂] [I⁻]

Therefore, order of the reaction = 2

Dimension of `k = "Rate"/([H_2O_2][I^(-)])`

= `("mol L"^(-1) s^(-1))/(("mol L"^(-1))("mol L"^(-1)))`

`= "Lmol"^(-1) s^(-1)`