Question

In a reaction involving a reactant with same charges, an increase of the dielectric constant will influence rate constant to
A. Uncountable
B. Remain
C. Increase
D. Decrease
E. Null

Answer 1

For the polar or charged reactants reaction the nature of solvent affect the rate constant.

Polar solvent with high dielectric constant stabilize the charge or ions present in the reaction and increase the reaction rate. While the non polar solvent may increase the rate of reaction when the charges are vanishing as the reaction proceed because the polar stabilize polar and non polar stabilize the non polar.

So as the reaction proceed there will be generation of ions and charge inside the solution which requires the high dielectric constant medium.

So.. The increase in the dielectric constant will leads to increase in the reaction rate.

Answer :- C (increase)