University:
Winston-Salem Forsyth County Schools
Course:
AP Chemistry
Academic year:

2015
Views:

142

Pages:

1
Author:

Spencer Small

Acid-Base and Redox Reactions Test Review Answers Practice Problems: 1. For the system 2SO2 (g) + O2 (g) ⇋ 2SO3(g), the reaction is exothermic for the production of SO3: a. Shifts left to increase the amount of SO2 b. Shifts right to use up the O2 c. Shifts left to relieve the extra heat from the temp increase d. Shifts right, to the side with fewer moles to decrease the pressure 2. What is the pH of a solution with a [H+] = 4.50x10-9 M? 8.35 3. What is the pOH of a solution with a [H+] = 3.91x10-6M? 8.59 4. What is the [OH-] of a solution with a pOH = 5.35? 4.47x10-6M 5. What is the [OH-] of a solution with a pH = 11.29? 1.95x10-3M For each of the following, write the balanced reaction that occurs using all appropriate symbols and balancing the reaction using lowest whole number coefficients. If No Reaction occurs, simply write NR. 6. Solutions of phosphoric acid and strontium hydroxide are mixed. 2H3PO4(aq) + 3Sr(OH)2(aq) ⇋ 6H2O(ℓ) + Sr3(PO4)2 (s) 7. A solution of acetic acid is added to solid copper(II) hydroxide 2HC2H3O2(aq) + Cu(OH)2(s) ⇋ 2H2O(ℓ) + Cu(C2H3O2)2(aq) For the following reactions, identify the reactant acting as the acid and the reactant acting as the base. 8. S2- + 2H3O+ H2S + 2H2O S2- - base H3O+ acid 9. NH4+ + H2ONH3 + H3O+ NH4+ - acid H2O – base 10. Which of the following are Bronsted-Lowry bases but are NOT Arrhenius bases? NH3, NaOH, Ca(OH)2, NaOCl, K2CO3, Fe(OH)3 Answer: NH3, NaOCl, K2CO3 (all non-hydroxide bases!) For the following reactions, identify the elements oxidized and reduced, the species that is the oxidizing agent and reducing agent. 11. Hypochlorite ions react with sulfide ions in acidic conditions to form chloride ions and solid sulfur. S oxidized ClO- oxidizing agent Cl reduced S2- reducing agent 12. Manganese(II) ions react with bismuthate ions (BiO3- ) in acidic conditions to form bismuth(III) ions and permanganate ions. Mn oxidized BiO3- oxidizing agent Bi reduced Mn2+ reducing agent