What is the rate-determining step?

The rate-determining step is simply the slowest step in a reaction mechanism of a multi-step reaction. 

Most reactions do not happen in one simple step. You may be familiar with overall reactions however these are usually carried out over multiple steps. The rate-determining step is the one which takes the longest.

One way you can think of it is to imagine two people washing up. One person is washing the dishes and the other is drying them. Even if the person drying them is very fast, the whole process will be slow if the person doing the washing is slow.

CK

Related Chemistry A Level answers

All answers ▸

At what temperature would 0.05 moles of nitrogen gas occupy 1000cm^3 at 50kPa?


What is covalent character, how does it arise. List a compound it does affect and explain the resulting properties covalent character affects.


How do I balance redox equations in acidic reactions, without trial and error, using half equations?


Flask Q (volume = 1.00 x 103 cm3 ) is filled with ammonia (NH3) at 102 kPa and 300 K. Calculate the mass of ammonia in flask Q. (Gas constant R = 8.31 J K−1 mol−1 )