Determine the pH of each solution. a. 0.10 M NH4CI c. 0.10 M NaCI b. 0.10 M NAC2H3O2

10. Which solution would be expected to have the highest pH? (No calculation needed.) A. 0.50 M NaOH B. 0.05 M HC1 C. 0.05 M CH3NH₂ D. 0.60 M CH3COOH

1. The equilibrium constant, K, for a monoprotic acid (propionic acid) is 1.3 x 10-5. Which of the following is the correct value of K, for the propionate ion, the conjugate base of propionic acid? a. 1.3 × 10⁹ b. 1.3 × 10-19 c. 7.7 x 104 d. 1.3 × 10-5 e. 7.7 x 10-10 -. Which of the following expressions correctly describes the equilibrium constant K, for the reaction given below? 4 NH3(g) +5 O₂(g) 4 NO(g) + 6 H₂O(g) a. Kc = b. Kc = c. Ke= d. Ke= e. Kc = [NO₂][H₂O] [NH3][0₂] 4[NH3]+5[0₂] 4[NO]+6[H₂0] [NO][H₂O16 [NH,[0₂] [NH₂] [0₂] [NO][H₂O] 4[NO]+6[H₂0] 4[NH3]+5[0₂]

22

For each of the following cases, decide whether the pH is less than 7, equal to 7, or greater than 7. a. 85 mL of 0.30 M H2S is mixed with 85 mL of 0.60 M NaOH. O The pH of the solution is less than 7. O The pH of the solution is equal to 7. O The pH of the solution is greater than 7. b. 70. mL of 0.65 M acetic acid, CH3 CO,H is mixed with 70. mL of 0.65 M NaOH. O The pH of the solution is less than 7. O The pH of the solution is equal to 7. O The pH of the solution is greater than 7. c. 80. mL of 0.65 M H2SO4 is mixed with 80. mL of 0.65 M NAOH. O The pH of the solution is less than 7. O The pH of the solution is equal to 7. O The pH of the solution is greater than 7.