Back
Problem 26c
Write balanced net ionic equations for the reactions that occur in each of the following cases. Identify the spectator ion or ions in each reaction. c. Fe(NO3)2(𝑎𝑞)+KOH(𝑎𝑞)⟶
- Separate samples of a solution of an unknown salt are treated with dilute solutions of HBr, H2SO4, and NaOH. A precipitate forms in all three cases. Which of the following cations could be present in the unknown salt solution: K+, Pb2+, Ba2+?
Problem 27
Problem 28
Separate samples of a solution of an unknown ionic compound are treated with dilute AgNO3, Pb1NO322, and BaCl2. Precipitates form in all three cases. Which of the following could be the anion of the unknown salt: Br-, CO32-, NO3-?
Problem 29
You know that an unlabeled bottle contains an aqueous solution of one of the following: AgNO3,CaCl2, or Al2(SO4)3. You take a portion of the solution and add an aqueous solution of Ba(NO3)2 to it, and observe that a white solid precipitates Then you take another portion of the unlabeled solution and add an aqueous solution of NaCl to it; nothing appears to happen. What is the most likely identity of the solution in the unlabeled bottle: silver nitrate, calcium chloride, aluminum sulfate?
Problem 30
Three solutions are mixed together to form a single solution; in the final solution, there are 0.2 mol Pb1CH3COO)2, 0.1 mol Na2S, and 0.1 mol CaCl2 present. What solid(s) will precipitate?
Problem 31
Which of the following solutions is the most acidic? a. 0.2 M LiOH b. 0.2 M HI c. 1.0 M methanol (CH3OH)
Problem 32
Which of the following solutions is the most basic? a. 0.6𝑀 NH3 b. 0.150 M KOH c. 0.100𝑀Ba(OH)2
Problem 33a
State whether each of the following statements is true or false. Justify your answer in each case. (a) Sulfuric acid is a monoprotic acid.
Problem 33b
State whether each of the following statements is true or false. Justify your answer in each case. (b) HCl is a weak acid.
Problem 33c
State whether each of the following statements is true or false. Justify your answer in each case. (c) Methanol is a base.
Problem 34a
State whether each of the following statements is true or false. Justify your answer in each case. (a) NH3 contains no OH- ions, and yet its aqueous solutions are basic
Problem 34b
State whether each of the following statements is true or false. Justify your answer in each case. (b) HF is a strong acid.
Problem 34c
State whether each of the following statements is true or false. Justify your answer in each case.
(c) Although sulfuric acid is a strong electrolyte, an aqueous solution of H2SO4 contains more HSO4- ions than SO42- ions.
Problem 35a
Label each of the following substances as an acid, base, salt, or none of the above. Indicate whether the substance exists in aqueous solution entirely in molecular form, entirely as ions, or as a mixture of molecules and ions. (a) HF
Problem 35b
Label each of the following substances as an acid, base, salt, or none of the above. Indicate whether the substance exists in aqueous solution entirely in molecular form, entirely as ions, or as a mixture of molecules and ions. (b) acetonitrile, CH3CN
Problem 35c
Label each of the following substances as an acid, base, salt, or none of the above. Indicate whether the substance exists in aqueous solution entirely in molecular form, entirely as ions, or as a mixture of molecules and ions. (c) NaClO4
Problem 35d
Label each of the following substances as an acid, base, salt, or none of the above. Indicate whether the substance exists in aqueous solution entirely in molecular form, entirely as ions, or as a mixture of molecules and ions. (d) Ba1OH22.
Problem 36
An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH, NH3, HNO3, KClO2, H3PO3, CH3COCH3 (acetone)?
Problem 37a
Classify each of the following substances as a nonelectrolyte, weak electrolyte, or strong electrolyte in water: a. H2SO3
- Classify each of the following aqueous solutions as a nonelectrolyte, weak electrolyte, or strong electrolyte: (a) PbCl2 (b) N(CH3)3 (c) CsOH (d) H2S (e) CrCl2 (f) Ni(CH3COO)2.
Problem 38
Problem 39
Complete and balance the following molecular equations, and then write the net ionic equation for each:
(a) HBr(aq) + Ca(OH)2(aq) →
(b) Cu(OH)2(s) + HClO4(aq) →
(c) Al(OH)3(s) + HNO3(aq) →
Problem 40a
Write the balanced molecular and net ionic equations for each of the following neutralization reactions: (a) Aqueous acetic acid is neutralized by aqueous barium hydroxide
Problem 40b
Write the balanced molecular and net ionic equations for each of the following neutralization reactions: (b) Solid chromium(III) hydroxide reacts with nitrous acid.
Problem 40c
Write the balanced molecular and net ionic equations for each of the following neutralization reactions: (c) Aqueous nitric acid and aqueous ammonia react.
Problem 41a,b
Write balanced molecular and net ionic equations for the following reactions, and identify the gas formed in each: (a) solid cadmium sulfide reacts with an aqueous solution of sulfuric acid (b) solid magnesium carbonate reacts with an aqueous solution of perchloric acid.
Problem 42a,b
Because the oxide ion is basic, metal oxides react readily with acids. (a) Write the net ionic equation for the following reaction: FeO(s) + 2 HClO4(aq) → Fe(ClO4)2(aq) + H2O(l) (b) Based on the equation in part (a), write the net ionic equation for the reaction that occurs between NiO(s) and an aqueous solution of nitric acid.
- As K2O dissolves in water, the oxide ion reacts with water molecules to form hydroxide ions. (a) Write the molecular and net ionic equations for this reaction. (b) Based on the definitions of acid and base, what ion is the base in this reaction? (c) What is the acid in the reaction? (d) What is the spectator ion in the reaction?
Problem 44
Problem 45a
True or false: a. If a substance is oxidized, it is gaining electrons.
Problem 47b
(a) Which region of the periodic table shown here contains elements that are easiest to oxidize? (b) Which region contains the least readily oxidized elements?
Problem 48a,b,c
Determine the oxidation number of sulfur in each of the following substances: (a) barium sulfate, BaSO4 (b) sulfurous acid, H2SO3 (c) strontium sulfide, SrS