Chapter 14, Problem 14.22QAP

Mixing the chelating reagent B with Ni(II) forms the highly colored NiB₂²⁺, whose solutions obey Beer’s lawat 395 nm overa wide range. Provided the analytical concentration of the chelating reagent exceeds that of Ni(II) by a factor of 5 (or more), the cation exists, within the limits of observation, entirely in the form of the complex. Use the accompanying data to evaluate the formation constant K_f for the process
   ${\text{Ni}}^{2+}+2\text{B}\rightleftharpoons {\text{NiB}}_2{}^{2+}$