Give the equilibrium expressions. 1. 2SO2 + O2 ⇆ 2SO3 2. N2 + 3H2 ⇆ 2NH3 3. NH4Cl + H2O ⇆ HCl + NH4OH

Predict the composition of the reaction at equilibrium. 요 ONa HO OH pK₂ 4 O Mixture of products and reactants. 100% reactants. 100% products. OH pka 10 HO ONa

For which test tube should your value for the equilibrium constant be most reliable? Justify your selection based on your data and your laboratory experience in completing this procedure. Equilibrium Constant, K Test Tube 1 - 75.0 Test Tube 2 - 88.2 Test Tube 3 - 167 Test Tube 4 - 161 Test Tube 5 - -598 Average Kc = -21.4

The questions below refer to the following system: Co(H2O)6 + 4 CI=C0C1 + 6H,O (pink) (blue) When cobalt(II) chloride is added to pure water, the Co-" ions hydrate. The hydrated form then reacts with the Cl ions to set up the equilibrium shown here. Which statement below describes the change that the system will undergo if water is added? Select one: O a. More chloride ions will be produced. O b. The equilibrium will shift to the right. O c. There will be less of the hydrated cobalt ion at the new equilibrium position. O d. More water will be produced. O e. The color will become more blue. here to search F4 F6 F7 F8 F10 F11 F12 Prisc %23 %24 & 4. 5 6 E R T G B

20. For each of the following equilibrium reactions and their associated K value, determine what species will be predominate at equilibrium.a. HC2H3O2(aq) + H2O(l) ⇄ H3O1+(aq) + C2H3O21-(aq) K=1.8x10-5b. Hydrochloric acid reacts with water to form the hydronium ion and the chloride ion. The K value is 1.8x1060c. Water reacts with water to form the hydronium ion and the hydroxide ion. The K value is 1.0x10-14d. NaC2H3O2(s) ⇄ Na1+(aq) + C2H3O21-(aq) K=2.5x1045

O KINETICS AND EQUILIBRIUM Helen v Using the small x approximation to solve equilibrium problems A chemist is studying the following equilibirum, which has the given equilibrium constant at a certain temperature: 3 O2(g) = 203(g) K,= 1. x 10-6 d. He fills a reaction vessel at this temperature with 15. atm of oxygen gas. Use this data to answer the questions in the table below. olo Can you predict the equilibrium pressure of O3, using only the tools O yes available to you within ALEKS? O no If you said yes, then enter the equilibrium pressure of O, at right. I atm Round your answer to 1 significant digit. Explanation Check II

Calculate the concentration of O2, if at equilibrium there are 0.552 mole of C2H4, 0.994 mole of CO2, 0.283 mole of H:O in a 0.585 L container and K= 7.45 _C:H«(g) + 30:(g) = 2CO:(g) + 2H20(g) *

For the base

Experiment 3, Part 1: Write the equilibrium equation established in a saturated potassium chloride, KCl, solution. equilibrium reaction: