Question

$2{\mathrm{Br}}^{-}+{\mathrm{H}}_2{\mathrm{O}}_2+2{\mathrm{H}}^{+}\to {\mathrm{Br}}_2+2{\mathrm{H}}_2\mathrm{O}$ Rate =$\mathrm{k}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)\left({\mathrm{H}}^{+}\right)\left({\mathrm{Br}}^{-}\right)$ What is the effect on rate constant on increasing bromide ions?

Answer 1

Effect of Rate constant :

• The rate constant is an entity that shows how the rate changes with time and the concentration of reactants.
• In the reaction,

$2{\mathrm{Br}}^{-}+{\mathrm{H}}_2{\mathrm{O}}_2+2{\mathrm{H}}^{+}\to {\mathrm{Br}}_2+2{\mathrm{H}}_2\mathrm{O}$

• Rate =$\mathrm{k}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)\left({\mathrm{H}}^{+}\right)\left({\mathrm{Br}}^{-}\right)$
• As the rate constant is directly proportional to the concentration of bromide ions.
• So, as the concentration of bromide ion increases the rate constant value increases.

Hence the rate constant goes on increasing if bromide ions increase simultaneously.