10.10 (a) Write equations for the reactions of KH with NH; and with ethanol. (b) Identify the conjugate acid-base pairs in each reaction.

3b

The cyanate anion is the conjugate base for both isocyanic and cyanic acid. Its structure corresponds to the most stable (lowest energy) Lewis electron dot structure for the molecular ion CNO. All of the following structures are valid representations of the cyanate anion except for...? :NEC-O: N=C=0 -2.. +1 :N-C=O: •. -1 :NEC=0

iwXA. 3. Write a net ionic equation for the equilibrium that causes the solution of KHTar in water to be slightly acidic:

Determine the pH of each of the following solutions. (a) 0.296 M arsenous acid (weak acid with Ka = 5.1e-10). (b) 0.315 M boric acid (weak acid with Ka = 5.8e-10). (c) 0.571 M pyridine (weak base with Kb = 1.7e-09).

ii. 2. Complete the equation for the reaction of each of the following with water. Then: i. Indicate whether the ion or molecule is an acid or base; and, ii. Indicate whether each reaction is explained by Arrhenius, Brønsted-Lowry, or both. a) Hl(aq) + H2O(1) = i. ii. c) C2H3O2 (aq) + H₂O(1) = i.

3.37 Predict the position of equilibrium for the following reaction: OH ОН + +

8) What are the respective concentrations (M) of Fe3+ and I afforded by dissolving 0.200 mol Fel3 in water and diluting to 725 mL?

16.

6. Which of the following statements is true about the following acid/base reaction? F (aq) + HSO4 (aq) 5 HF (aq) + S0,² (aq) 2- a) F is an acid. b) HF is the conjugate acid of SO42. c) SO,² is the conjugate base of HSO4". d) F¯ is the conjugate base of HSO4". e) none of the above