how to determine rate of very fast chemical reactions?

Question

i m reffering to chemical kinetics

Answer 1

Observation depends on the reaction phenomenon observed. Are you seeing a color change? That can be observed with a photodiode, these have a very fast reaction time. And a computer data acquisition system can provide you with a result.

Is the chemical change the production of heat? Typically some type of temperature probe and calorimeter might be used for that. But for a fast reaction a calorimeter will not do. So what do you use? The answer is light again, in the case IR light – the wave length of heat. Same solution as above, different wave length.

What about if the product of reaction is a gas? They have some nice solid state pressure transducers that can be compressed by a closed system.

Sometimes you have to get creative, like creating a derivative product (a reaction with the products of your first reaction) and then measuring that second reaction.