Entry Task: Jan 15 th Tuesday

1. Entry Task: Jan 15th Tuesday An important reaction in the commercial production of hydrogen is CO(g) + H2O(g)  H2(g) + CO2(g) How will this system at equilibrium shift in each of the four following cases? (a) Gaseous carbon dioxide is removed. (b) Water vapor is added. (c) The pressure is increase by adding helium gas. (d) The temperature is increased.

2. Agenda • Discuss Non-equilibrium/LeChatelier ws. • pHet activity on equilibrium • Pre Lab LeChatelier Lab

4. H2(g) + I2 (g)  2HI If Kc = 49 and [H2] = 0.10M, [I2] = 0.10M, and [HI] = 0.70 M Q = 49  49 so its at equilibrium Br2 + Cl2 2BrCl If Kc = 6.9 and [Br2] = 0.10M, [Cl2] = 0.20M, and [BrCl] = 0.45M Q = 10.2 > K shifts toward reactants

5. HF (aq) + H2O (l) F- (aq) + H3O+ (aq) If Kc = 6.8 x 10-4 and [HF] = 0.20M, [F-‑] = 2.0 x 10-4M, [H3O+] = 2.0 x 10-4M, and H2O (l) = 1.0 x 10-14M Q = 2 x10-7 < K shift towards product 2H2(g) + O2 (g) 2H2O (g) If Kc = 9.1 x 1080 and [H2] = 3.0 x 10-30M, [O2] = 2.2 x 10-24M, and [H2O] =0.0180M Q = 1.64 x1079> K shifts toward reactants

6. 2N2O (g) < ---- > 2N2 (g) + O2 (g) If Kc= 7.0 x 1034 and [N2O] = 2.4 x 10-18M, [N2] = 0.0360M and [O2] = 0.0090M Q = 2.0 x1030 > K shift towards reactant

7. No change Heat + No change No change

8. No change

9. 0.0 M 0.44 M 0.0 M 1.95 M -0.385 M 0.385 M 0.385 M -0.385 M 0.385 M 0.385 M 1.57 M 0.055 M Molarity Go Stoichiometry Here BUT they are all 1:1 3.9 mol/2 = 1.95M NO 0.88 mol/2 = 0.44 M CO2 0.11 mol/2 = 0.055 M CO2 eq (0.385 M) (0.385 M) Kc= 1.72 (1.57 M) (0.055 M)

10. When you are finished- Turn in and get started on Pre-Lab