Consider the following reaction:
PCl5(g) -> PCl3(g) + Cl2(g) .
At equilibrium, [PCl5] = 2.00 M and [PCl3] = [Cl2] = 1.00 M. If suddenly 1.00 M PCl5(g), PCl3(g), and Cl2(g) are each added, calculate the equilibrium concentration of Cl2(g).
1. 1.86 M
2. 2.32 M
3. 1.12 M
4. 1.35 M
5. 3.35 M
6. 2.18 M