Unit 5 - Part 2 - Hand-In Assignment
1. 1.00\times10^{-3} mol of PCl$_5$ gas is introduced into a 250.0mL flask at 284$^\circ$C. Equilibrium is established
with the following reaction:
PCl$_5$(g) $\rightleftharpoons$ PCl$_3$(g) + Cl$_2$(g)
After equilibrium is reached, it is found that there are 9.65\times10$^{-5}$ mol of Cl$_2$. What is K$_{eq}$ for this
reaction? (3 marks for completed ICE Box; 1 mark for K$_{eq}$ expression, 2 marks for K$_{eq}$, 1 mark for s.f.; 7 marks total)
2. At some temperature, K$_{eq}$ = 33.0 for the reaction H$_2$(g) + I$_2$(g) $\rightleftharpoons$ 2HI(g). If initially, [H$_2$] = 0.0600 M
and [I$_2$] = 0.0600 M, what are all three equilibrium concentrations? (3 marks for completed ICE Box; 1 mark
for K$_{eq}$ expression, 2 marks for work, 3 marks for EACH equilibrium concentration; 15 marks total)
