A certain reaction is getting converted to in solution

CHEMISTRY · Subjective · AP · Chemistry · Kinetics · Kinetics

Problem

A certain reaction

B^{n+}

is getting converted to

B^{(n+4)+}

in solution. The rate constant of this reaction is measured by titrating a volume of the solution with a reducing agent which reacts only with

B^{n+}

and

B^{(n+4)+}

. In the process it converts

B^{n+}

B^{(n+2)+}

and

B^{(n+4)+}

B^{(n-1)+}

. At

t=0

, the volume of reagent consumed is 25 mL and at

t=10

minute, the volume used is 32 mL. Calculate the rate constant for the conversion of

B^{n+}

B^{(n+4)+}

assuming it to be a first order reaction.