would you have determined an identical rate law for the reaction of crystal violet and oh, if you had used [oh] of 0.030m and 0.040m instead of the concentrations you did use in the procedure? briefly explain.



Answer :

Two systems with identical Rate Laws but dissimilar initial concentrations are incompatible.

What is Rate Law?

A rate law demonstrates how the concentration of the reactant affects the rate of a chemical reaction. The rate law typically takes the form rate = k[A]n for a reaction like aA products, where k is the proportionality constant referred to as the rate constant and n is the order of a reaction with respect to A. The amount of n must be determined experimentally because it is unrelated to the reaction stoichiometry.

Rate Law= K × Cvc × Coh
Vc+OH
We use the abbreviation Vc for Voilet crystals.
Here, limiting reactant is (Vc) which is the violet crystals.
Cvc =  initial Cvc × (1 - x)
Coh = initial Cvc × (1 - x)
Using these values in the 1st equation
Rate Law = K × Cvc × Coh
we get,
Rate Law = K × (Cvc 1)² × (1-x)²

This new equation demonstrates that the rate law depends on the initial concentration of the reagents.

As a result, we can state that the rate law is not the same when the values of two systems differ.


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