How to determine order of the reaction by Isolation method??
Answers
order of a reaction can be determined by adding the powers to which each concentration term is raised in rate law experission.
and this is very important to to understand that rate law experision is experimently determined .
it cant be obtained only by analysing a balanced chemical reaction.
Methods of Finding the Order of Reaction
Ostwald Isolation Method
This method is introduced by Ostwald and is used to determine theorder of a reaction with respect to one reactant at a time. The totalorder of the reaction can be calculated by adding all the orders of thereaction for individual reactant.The principle behind this method is that if the concentration of all butone reactant is taken in excess, then during the course of reaction, theconcentration of those reactants taken in excess will remain constantand the variation in the rate will correspond to the concentration ofthat reactant whose concentration is small.The process is repeated for other reactants present in the chemicalreaction one by one and order with respect to each reactant can bedetermined. By adding all the orders of the individual reactant wewill get overall order of the reaction .For example,Suppose, we isolate A by taking B and in large excess and get orderof reaction with respect to A (say p) Similarly, q and r are the order ofreactions for B and C by taking C and A in excess for q order of B andA, B in excess for r order of C.