Question

The rate of the iodine clock reaction can be represented by the formula rate = k [NO]2[H2]. Explain why the [NO] is squared, but the [H2] is not squared. Explain in one well-developed paragraph.

Answer 1

rate = k [NO]^2[H2]

in the experiment if keep the concentration of H2 is constant by changing concentration of NO we obsered the rate change . for every change in NO concentration rate becomes double. this indicates order with respect to NO is two .

now NO concentration is kept constant and by changing concentration of H2 we observed the rate , in this case rate becomes same as change in conc of H2 . so order with respect to H2 is 1.

now the rate law = k [NO]^2 [H2]