S ar A white precipitate is visible for the following equilibrium. Water is added to dilute the dissolved ions in the equilibrium. Select the answer that best describes the result of adding water. Al(OH)3 (s) Al3+ (aq) + 3OH(aq) 1 Q decreases so the reaction shifts right. Q decreases so the reaction shifts left. Q increases so the reaction shifts right. Q increases so the reaction shifts left.

Consider the following equilibrium:  Br2(l) + H2O(l) =2H+(aq) + Br-(aq) + BrO-(aq) Write the Kc expression. A chemist would like to shift this equilibrium to the product side. The only reagents that are available are HCl(aq) and NaOH(aq). Which solution should the chemist add? Explain your answer.  Would adding this reagent cause the Kc value to permanently change? Explain your answer.

Consider the cobalt-chloride ion equilibrium shown. Co(H,O)%*(aq)+4Cl (aq) = CoCl (aq) +6H,O) 4 blue pink Determine how the equilibrium will be affected by the addition of each reagent. Adding HCI will shift the equilibrium Adding water will shift the equilibrium -

C2,H2905S- (ag) + NH,CI (ag) → C2,H29O5SH (ag) + NH3 (aq) Yellow Blue Reaction after it reaches equilibrium appears Green A. Assume the reaction mixture is at equilibrium, appearing green in color, and at room temperature before each of the following disturbances. Explain which direction the reaction shifts to re-establish equilibrium and predict how the color of the solution will change 1.100 mL of water, H2O is added to the reaction mixture. 2. Solid platinum, Pt, is added to the reaction mixture. It reacts with NH3 to form N and H2 gasses. B. When the green reaction mixture at equilibrium is heated the color changes to green-blue, and then eventually, a dark blue color. When the green reaction mixture at equilibrium is placed in an ice water bath the solution color changes to a yellow-green, and eventually a bright yellow color. Is the reaction exothermic or endothermic? |

The graph above represents the change in concentrations during a chemical reaction. What are the reactants in the reaction?  Cannot be determined HI H2 I2 What are the products in the reaction? HI I2 H2 Cannot be determined Which point(s) are at equilibrium?  E B D C A

NAME: COC12(g) has a 8. At 100.0°C, the equilibrium constant for the reaction: COg) + Cl2(g) value of 4.6 x 10°, If 0.40 mol of COC12 is placed into a 10.0 L flask at 100.0°C, what will be the equilibrium concentration of all species? (A simplifying approximation that will make the solution of the resulting equation easier is to note that X is much less than 0.040 mol/L. This means that 0.040-x is approximately 0.040.)

For the balanced reaction equation given below, 0.500 moles of H2 and 0.500 moles of I2 are placed in a 10.0 L reaction vessel.  At equilibrium the concentration of HI was measure to be 0.078 M.  Determine Kc for this reaction. H2(g) + I2(g)              ↔                  2HI(g)

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I Review | Constants | Periodic Table Part B When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal to K (the equilibrium constant). If a stress is applied to the mixture that changes the value of Q, then the system is no longer at equilibrium. To regain equilibrium, the reaction will either proceed forward or in reverse until Q is equal to K once again. Alternatively, equilibrium can be disrupted by a change in temperature, which changes the value of K. The result however is the same, and the reaction will proceed forward or in reverse until Q is equal to the new K. Le Châtelier's principle summarizes this idea: The following system is at equilibrium:A(s) + 4B(g) = C(g)Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Drag the appropriate items to their respective bins. • View Available Hint(s) Reset Help If a stress is applied to a reaction mixture at equilibrium,…

5. A container is filled with 0.450 M CH3OH (g) and 0.050 M H2(g). When equilibrium is established at some unspecified temperature, [CH3OH] -0.200 M. Complete the following I-CE table and determine the equilibrium constant (Kc) of this reaction. Initial concentration / M Change in concentration/M Equilibrium concentration / M CO (g) 0.000 + 2 H2(g) 14 CH₂OH (g) 0.050 0.450