Chapter 17.12, Problem 1PPA

Practice ProblemATTEMPT

In the presence of aqueous ammonia, cobalt(III) forms the complex ion $\text{Co}{\left(\text{NH3}\right)}_6^{3+}$. Determine the molar concentration of free cobalt(III) ion in solution when 0.15 mole of $\text{Co}{\left({\text{NO}}_{\text{3}}\right)}_3$ is dissolved in a liter of 2.5 M aqueous ammonia.