Question

A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction.

The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the reaction obeys the following rate law.

rate = k(H3O+)(OH-)

Calculate the rate of reaction in a neutral solution (pH=7.00).

Answer 1

What's the problem with substituting 10^-7 for hydronium and hydroxide ions along with k and solving?

Answer 2

So would it be

rate = (10^-7)*(10^-7)*(1.4X10^11)

Answer 3

That's what I would do.