Just 6, 7, 8 and 9 please equilibrium? If not, in what direction will the reaction proceed? 3. For the reaction CO (8)+ Cl2 (8)COC2 (g) Ke-255 at 1000 K. If a reaction mixture initially contains 0.1500 M CO and 0.175 M Cl2 at 1000K, what are the equilibrium concentrations of all the reactants and products? Complete the table 4. H30\'1 ?? 3.5 x 103 1.8x109 For each strong acid solution, determine [H3O*], pH, and pOH 3.8x107 7.15 5. a. 0.25 M HCI b. 0.015 M HNO 6. Determine the [H30] & pH of an HNO2 solution of each concentration a. 0.500 M b. 0.100 M 7. For each strong base solution, determine [OH], pOH, and pH a. 0.15 M NaOH b. 1.5x103 M Ca(OH)2 8. Determine the [OH], pH, and pOH of a 0.125 M CO32 solution. 9. A 0.135 M solution of a weak base has a pH of 11.23. Determine Kb for the base. Solution 6) HNO2 ------> H+ + NO2- pKa of HNO2 = 3.15 pH of a weak acid = 1/2(pKa - logC) a) pH = 1/2(3.15 - log(0.5)) pH = 1.7255 -log[H+] = 1.7255 [H+] = 10^-1.7255 = 0.0188 b) pH = 1/2(3.15 - log(0.1)) pH = 2.075 -log[H+] = 2.075 [H+] = 10^-2.075 = 0.008414 7) NaOH is Stron base so [OH-] = 0.15 pOH = -log[OH-] pOH = -log(0.15) = 0.824 pH = 14 - pOH = 14 - 0.824 = 13.176 Ca(OH)2 is also a strong base so [OH-] = 1.5*10^-3 pOH = -log(1.5*10^-3) = 2.824 pH = 14 - pOH = 14 - 2.824 = 11.176 8) CO32- is base coming from the acid H2CO3 so Kb = 5.6*10^-11 pKb of CO32- = -log(5.6*10^-11) = 10.252 pOH = 1/2(pKb - logC) pOH = 1/2(10.252 - log(0.125)) pOH = 5.578 [OH-] = 10^-5.578 = 2.6424*10^-6 pH = 14 - 5.578 = 8.422 9) pH = 11.23 pOH = 14 - pH = 14 - 11.23 = 2.77 pOH = 1/2(pKb - logC) 2.77 = 1/2(pKb - log(0.135)) pKb = 4.67 .