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문제 23c
Will precipitation occur when the following solutions are mixed? If so, write a balanced chemical equation for the reaction. c. FeSO4 and Pb(NO3)2
문제 24b
Identify the precipitate (if any) that forms when the following solutions are mixed, and write a balanced equation for each reaction. b. KOH and Cu(NO3)2
문제 25a
Which ions remain in solution, unreacted, after each of the following pairs of solutions is mixed? (a) potassium carbonate and magnesium sulfate
문제 25c
Which ions remain in solution, unreacted, after each of the following pairs of solutions is mixed? (c) ammonium phosphate and calcium chloride
문제 26a
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. a. Cr2(SO4)3(𝑎𝑞)+(NH4)2CO3(𝑎𝑞)⟶
문제 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+?
문제 27
문제 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-?
문제 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?
문제 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?
문제 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)
문제 32
Which of the following solutions is the most basic? a. 0.6𝑀 NH3 b. 0.150 M KOH c. 0.100𝑀Ba(OH)2
문제 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.
문제 33b
State whether each of the following statements is true or false. Justify your answer in each case. (b) HCl is a weak acid.
문제 33c
State whether each of the following statements is true or false. Justify your answer in each case. (c) Methanol is a base.
문제 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
문제 34b
State whether each of the following statements is true or false. Justify your answer in each case. (b) HF is a strong acid.
문제 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.
문제 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
문제 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
문제 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
문제 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.
문제 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)?
문제 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.
문제 38
문제 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) →
문제 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
문제 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.
문제 40c
Write the balanced molecular and net ionic equations for each of the following neutralization reactions: (c) Aqueous nitric acid and aqueous ammonia react.
문제 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.