Question 1

Which of the following is a strong base?

Accepted Answer

A)  NH 3
B)  Ca(OH) 2
C)  Al(OH) 3
D)  B(OH) 3
E)  CH 3OHF) A) and E)
G) None of the above

Question 2

Copper(II)  sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl2 are mixed with 42.0 mL of 0.600 M (NH4) 2S? Aqueous ammonium chloride is the other product.

Accepted Answer

A)  2.41 g
B)  1.82 g
C)  1.21 g
D)  0.909 g
E)  0.044 gF) B) and E)
G) D) and E)

Question 3

In a redox reaction, the reducing agent undergoes loss of electrons.

Accepted Answer

A) True 
 B)False

Question 4

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Accepted Answer

A)  H + and OH −
B)  H + and Rb +
C)  Rb + and Br −
D)  Br - and OH −
E)  There are no spectator ions in this reaction.F) B) and C)
G) C) and E)

Question 5

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq)  + Na2CO3(aq)  →

Accepted Answer

A)  copper(I) carbonate, Cu 2CO 3
B)  copper(II) carbonate, Cu 2CO 3
C)  copper(I) carbonate, CuCO 3
D)  copper(II) carbonate, CuCO 3
E)  sodium chloride, NaClF) A) and C)
G) A) and B)

Question 6

Predict the product(s)  for the following reaction. H2SO4(aq)  + KOH(aq)  →

Accepted Answer

A)  K 2SO 4( aq) + H 2O( l) 
B)  K 2S( aq) + H 2O( l) 
C)  K( s) + H 2( g) + SO 3( g) 
D)  KSO 4( aq) + H 2O( l) 
E)  No reaction occurs.F) None of the above
G) D) and E)

Question 7

Magnesium carbonate, MgCO3, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Accepted Answer

A)  Mg 2+ and CO 3 2−
B)  Na + and Cl −
C)  Mg 2+ and Cl −
D)  Na + and CO 3 2−
E)  None of these choices are correct.F) A) and B)
G) C) and E)

Question 8

Select the classification for the following reaction. CaCl2·H2O(s)  2·H2O(s)    CaCl2(s)  + H2O(g)  A) Combination B) Decomposition C) Displacement D) Acid-base E) Precipitation" class="answers-bank-image d-inline" rel="preload" > CaCl2(s)  + H2O(g)

Accepted Answer

A)  Combination
B)  Decomposition
C)  Displacement
D)  Acid-base
E)  PrecipitationF) A) and C)
G) None of the above

Question 9

Aqueous potassium iodate (KIO3)  and potassium iodide (KI)  react in the presence of dilute hydrochloric acid, as shown below. KIO3(aq)  + 5KI(aq)  + 6HCl(aq)  → 3I2(aq)  + 6KCl(aq)  + 3H2O(l) 
What mass of iodine (I2)  is formed when 50.0 mL of 0.020 M KIO3 solution reacts with an excess of KI and HCl?

Accepted Answer

A)  0.13 g I 2
B)  0.25 g I 2
C)  0.38 g I 2
D)  0.76 g I 2
E)  None of these choices are correct.F) A) and B)
G) None of the above

Question 10

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Accepted Answer

A)  CaCl 2
B)  HNO 3
C)  NH 3
D)  C 6H 12O 6 (glucose) 
E)  CO 2F) D) and E)
G) A) and B)

Question 11

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq)  + BaCl2(aq)  →

Accepted Answer

A)  Ba 2CO 3
B)  BaCO 3
C)  NaCl
D)  NaCl 2
E)  BaOF) A) and B)
G) B) and E)

Question 12

In an acid-base (neutralization) reaction the indicator will change color at the end point.

Accepted Answer

A) True 
 B)False

Question 13

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq)  + LiOH(aq)  →

Accepted Answer

A)  LiCH 3COO
B)  Li(CH 3COO) 2
C)  MgOH
D)  Mg(OH) 2
E)  CH 3OHF) B) and C)
G) A) and C)

Question 14

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

Accepted Answer

A)  0.800 L
B)  0.400 L
C)  0.200 L
D)  0.100 L
E)  None of these choices are correct.F) B) and E)
G) B) and C)

Question 15

Predict the product(s)  for the following reaction. Cl2O7(g)  + H2O(l)  →

Accepted Answer

A)  HClO 4( aq) 
B)  H 2ClO 4( aq) 
C)  H(ClO 4) 2( aq) 
D)  HCl( aq) + O 2( g) 
E)  HClO 3( aq) F) None of the above
G) B) and C)

Question 16

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Accepted Answer

A) True 
 B)False

Question 17

What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

Accepted Answer

A)  0.178 L
B)  0.25 L
C)  0.71 L
D)  1.78 L
E)  178 LF) A) and B)
G) A) and C)

Question 18

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Accepted Answer

A)  41.3 g
B)  31.9 g
C)  16.1 g
D)  8.77 g
E)  2.41 gF) A) and B)
G) A) and C)

Question 19

Which one of the following is not a redox reaction?

Accepted Answer

A)  2Na( s) + 2H 2O( l) → 2NaOH( aq) + H 2( g) 
B)  H 2( g) + Cl 2( g) → 2HCl( g) 
C)  2H 2O 2( aq) → 2H 2O( l) + O 2( g) 
D)  Fe 2O 3( s) + 3H 2SO 4( aq) → Fe 2(SO 4) 3( aq) + 3H 2O( l) 
E)  2KMnO 4( aq) + 10FeSO 4( aq) + 8H 2SO 4( aq) → K 2SO 4( aq) + 2MnSO 4( aq) + 5Fe 2(SO 4) 3( aq) + 8H 2O( l) F) All of the above
G) D) and E)

Question 20

How many moles of ions are released when 0.27 mol of cobalt(II)  chloride, CoCl2, is dissolved in water?

Accepted Answer

A)  0.81 mol
B)  0.54 mol
C)  0.27 mol
D)  0.18 mol
E)  0.090 molF) A) and B)
G) A) and C)

Exam 4: Three Major Classes of Chemical Reactions

Which one of the following is not a redox reaction?

Correct Answer
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Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl₂ are mixed with 42.0 mL of 0.600 M (NH₄) ₂S? Aqueous ammonium chloride is the other product.

Correct Answer
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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) →

Correct Answer
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In an acid-base (neutralization) reaction the indicator will change color at the end point.

Correct Answer
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What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Correct Answer
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Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

Correct Answer
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Predict the product(s) for the following reaction. Cl₂O₇(g) + H₂O(l) →

Correct Answer
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What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

Correct Answer
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Predict the product(s) for the following reaction. H₂SO₄(aq) + KOH(aq) →

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) →

Correct Answer
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Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Correct Answer
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Which of the following is a strong base?

Correct Answer
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Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) →

Correct Answer
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A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Correct Answer
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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

Correct Answer
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Correct Answer
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In a redox reaction, the reducing agent undergoes loss of electrons.

Correct Answer
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When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Correct Answer
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What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

Correct Answer
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Exam 4: Three Major Classes of Chemical Reactions

Which one of the following is not a redox reaction?

Correct AnswerverifiedShow Answer

Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl2 are mixed with 42.0 mL of 0.600 M (NH4) 2S? Aqueous ammonium chloride is the other product.

Correct AnswerverifiedShow Answer

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) →

Correct AnswerverifiedShow Answer

In an acid-base (neutralization) reaction the indicator will change color at the end point.

Correct AnswerverifiedShow Answer

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. CaCl2·H2O(s) CaCl2(s) + H2O(g)

Correct AnswerverifiedShow Answer

Predict the product(s) for the following reaction. Cl2O7(g) + H2O(l) →

Correct AnswerverifiedShow Answer

What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

Correct AnswerverifiedShow Answer

Predict the product(s) for the following reaction. H2SO4(aq) + KOH(aq) →

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq) + LiOH(aq) →

Correct AnswerverifiedShow Answer

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Correct AnswerverifiedShow Answer

Which of the following is a strong base?

Correct AnswerverifiedShow Answer

Magnesium carbonate, MgCO3, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq) + BaCl2(aq) →

Correct AnswerverifiedShow Answer

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Correct AnswerverifiedShow Answer

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?

Correct AnswerverifiedShow Answer

Aqueous potassium iodate (KIO3) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below. KIO3(aq) + 5KI(aq) + 6HCl(aq) → 3I2(aq) + 6KCl(aq) + 3H2O(l) What mass of iodine (I2) is formed when 50.0 mL of 0.020 M KIO3 solution reacts with an excess of KI and HCl?

Correct AnswerverifiedShow Answer

In a redox reaction, the reducing agent undergoes loss of electrons.

Correct AnswerverifiedShow Answer

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Correct AnswerverifiedShow Answer

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl₂ are mixed with 42.0 mL of 0.600 M (NH₄) ₂S? Aqueous ammonium chloride is the other product.

Correct Answer
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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) →

Correct Answer
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Correct Answer
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Correct Answer
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Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

Correct Answer
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Predict the product(s) for the following reaction. Cl₂O₇(g) + H₂O(l) →

Correct Answer
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Correct Answer
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Predict the product(s) for the following reaction. H₂SO₄(aq) + KOH(aq) →

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) →

Correct Answer
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Correct Answer
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Correct Answer
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Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) →

Correct Answer
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Correct Answer
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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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