In this article (and video above), to help you prepare for the FE exam, we calculate the concentration of a metal compound Hg2+. This problem type may be found in the Chemistry and Biology or Chemical Reactions section of the FE Exam, and was created and solved by Engineer in training, Enrique Ivers, LEED Green Associate.
The Chloride (Cl–) concentration in a lake is found to be 2.5 x 10-2. The HgCl₂ (aq) concentration is found to be 5 x 10-7M. The following chemical equations and equilibrium constants apply:
The concentration of Hg2+ is most nearly: