$43$ Marks

Section D$.$ Thermodynamics and Pourbaix Diagrams

Your lab is measuring the thermchemical properties of Chronius$-89($C$89),$ a new formulation of an intermetallic composite that behaves like a single element $($designated $"x").$ The intended use of the alloy is a light$-$weight, high$-$purity water tank for storing purified water. You team has been working for $3$ a to develop appropriate thermochemical data and has finally demonstrated the system works at the maximum design temperature, $62C.$ This is the temperature of the condensate from the final distillation column for ultimate purification. The Principal Investigator has just been escorted off site, leaving you to finish the Pourbaix diagram and writeup the report. The final processed data is provided in Table D$1.$ A partial Pourbaix diagram is shown in Figure D$1($end of exam$),$ but unfortunately it is not labeled and only shows some sketched lines $($dotted lines$).$

Note: at $62Cp{K}_w=13\mathrm{.}0$

Table D$1$: Equilibrium Data for $C89$ in Pure Water at $62C$

$\backslash$table$[[,$Reaction$],[1,x^{+}+e^{-}=x$