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Important Points About Order of Reaction is considered one the most difficult concept.
16 Questions around this concept.
For the reaction rate is given by then the order of the reaction is
Which one of the following statements for the order of a reaction is incorrect?
Order of reaction is defined as the number of reactants which determine the rate of reaction. In other words, it is the sum of exponents raised on active masses of reactants in a rate law equation.
Let us consider this reaction
Rate law equation for the reaction can be given as:
Rate constant and order for various reacting species is an experimental finding and cannot be predicted directly from the stoichiometry of the balanced reaction.
It is an experimental value.
It may be zero, negative or in fraction.
Order of reaction depends upon temperature, pressure and concentration etc.
It determines rate of reaction.
Order of reaction is determined by the slowest step of the reaction.
High order reactions are rare due to less chance of effective collisions between molecules.
Anything in excess is not counted in order of the reaction. Example, in hydrolysis of ester and sugar water is in excess so it is neglected for order.
Consider the reaction:
The rate law for this reaction is given as follows:
Now, x and y are the coefficients that are determined experimentally.
K = Rate constant
x,y = Order of reaction with respect to A and B.
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