Give the characteristic of a second-order reaction having only one reactant. The

Question

Give the characteristic of a second-order reaction having only one reactant. The rate of the reaction is not proportional to the concentration of the reactant. The rate of the reaction is proportional to the square of the concentration of the reactant. The rate of the reaction is proportional to the squareroot of the concentration of the reactant The rate of the reaction is proportional to the natural logarithm of the concentration of the reactant. The rate of the reaction is directly proportional to the concentration of the reactant. A rate is equal to 0.0200 M/s. If [A] = 0.100 M and rate = k[A]^1, what is the new rate if the concentration of [A] is increased to 0.200 M? 0.0200 M/s 0.0400 M/s 0.0600 M/s 0.800 M/s 0.100 M/s

Explanation / Answer

Answer (5) Give the characteristic of a second order reaction having only one reactant.

(B) The rate of the reaction is proportional to the square of the concentration of the reactant.

For a second order reaction, the kinetic law for the initial rate V of a reaction is: V=k[A][B]orV=k[R]2, e.g. the initial rate is proportional to the product of two concentrations, where A, B and R are reactants.

Explanation:

The simplest mechanistic explanation of second order is that the rate determining step consisists of a transformative, or effective collision between the two species A+B or R+R.

In fact reactive collisions are as much probable as more concentrated are the species involved.

However, more complicated mechanisms can be put forward to give the same mathematical dependance for the reaction rate from reactants' concentrations.

The true mechanism for a specific reaction in a given solvent, should be confirmed by more experimental information, besides the kinetic law.

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