2)What is the steady state approximation?
Let us consider consecutive reaction means the reaction in series. In these reaction intermediate is formed.
A is the reactant
I is the Intermediate
C is the product
dI/dt=0 steady state approximation
It means the concentration of intermediate product with respect to time is constant
Overall rate law
dI/dt = K1A-K2I
At steady state approximation
From above equation it is clear that the rate of consumption of intermediate is equal to the rate of formation of intemediate
We also use steady state approximation because the rate law expression is in terms of reactants not in terms of intermediate.