Question 1

Which of the following will be least soluble in water?

Accepted Answer

A)  Potassium sulfate, K 2SO 4
B)  Ammonium nitrate, NH 4NO 3
C)  Chloromethane, CH 3Cl
D)  Calcium chloride, CaCl 2
E)  Ethanol, C 2H 6O

Question 2

Select the classification for the following reaction. NH3(aq)  + HNO3(aq)  → NH4NO3(aq)

Accepted Answer

A)  Precipitation
B)  Acid-base
C)  Redox
D)  Decomposition
E)  None of these choices are correct. B

Question 3

Calculate the oxidation number of the chlorine in perchloric acid, HClO4, a strong oxidizing agent.

Accepted Answer

A)  −1
B)  +4
C)  +5
D)  +7
E)  None of these choices are correct.

Question 4

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles, ℳ = 139.04 g/mol) .

Accepted Answer

A)  8.625 M
B)  1.199 M
C)  0.8339 M
D)  0.2031 M
E)  0.008625 M

Question 5

Which, if any, of the following properties applies to weak acids?

Accepted Answer

A)  They are strong electrolytes.
B)  They are excellent conductors of electricity.
C)  When dissolved in water, they do not ionize completely.
D)  All of these choices are correct.
E)  None of these choices are correct.

Question 6

Select the correct set of products for the following reaction. Ba(OH) 2(aq)  + HNO3(aq)  →

Accepted Answer

A)  BaN 2( s) + H 2O( l) 
B)  Ba(NO 3) 2( aq) + H 2O( l) 
C)  Ba( s) + H 2( g) + NO 2( g) 
D)  Ba 2O( s) + NO 2( g) + H 2O( l) 
E)  No reaction occurs.

Question 7

Select the precipitate that forms when aqueous lead(II)  nitrate reacts with aqueous sodium sulfate.

Accepted Answer

A)  NaNO 3
B)  Na 2NO 3
C)  PbSO 4
D)  Pb 2SO 4
E)  PbS

Question 8

How many mL of concentrated nitric acid (HNO3, 16.0 M)  should be diluted with water in order to make 2.00 L of 2.00 M solution?

Accepted Answer

A)  32.0 mL
B)  62.5 mL
C)  125 mL
D)  250 mL
E)  500 mL

Question 9

Reduction is the loss of electrons.

Accepted Answer

A) True 
 B)False

Question 10

What is the oxidation number of iodine in I2.

Accepted Answer

A)  −1
B)  0
C)  +1
D)  +7
E)  None of these choices are correct.

Question 11

Select the classification for the following reaction. BaCl2(aq)  + K2SO4(aq)  → BaSO4(s)  + 2KCl(aq)

Accepted Answer

A)  Precipitation
B)  Acid-base
C)  Redox
D)  Decomposition
E)  None of these choices are correct.

Question 12

Some covalent compounds dissolve in water to produce conducting solutions.

Accepted Answer

A) True 
 B)False

Question 13

How many moles of H+(aq)  ions are present in 750 mL of 0.65 M hydrochloric acid?

Accepted Answer

A)  1.2 mol
B)  0.98 mol
C)  0.87 mol
D)  0.65 mol
E)  0.49 mol

Question 14

Which one of the following ionic compounds is soluble in water?

Accepted Answer

A)  Na 2S
B)  PbI 2
C)  AgCl
D)  CuS
E)  Ca 3(PO 4) 2

Question 15

In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Accepted Answer

A) True 
 B)False  False

Question 16

Which of the following is a weak acid?

Accepted Answer

A)  H 2SO 4
B)  HNO 3
C)  HF
D)  HBr
E)  HCl

Question 17

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl2(l)  2(l)    ? A) CaCl 2( l)    Ca( l) + 2Cl -( l)  B) CaCl 2( l)    Ca 2+( l) + Cl 2( g)  C) CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  D) CaCl 2( l)    Ca( l) + Cl 2( g)  E) CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > ?

Accepted Answer

A)  CaCl 2( l)  2(l)    ? 
A)  CaCl 2( l)    Ca( l) + 2Cl -( l)  
B)  CaCl 2( l)    Ca 2+( l) + Cl 2( g)  
C)  CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  
D)  CaCl 2( l)    Ca( l) + Cl 2( g)  
E)  CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > Ca( l) + 2Cl -( l) 
B)  CaCl 2( l)  2(l)    ? 
A)  CaCl 2( l)    Ca( l) + 2Cl -( l)  
B)  CaCl 2( l)    Ca 2+( l) + Cl 2( g)  
C)  CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  
D)  CaCl 2( l)    Ca( l) + Cl 2( g)  
E)  CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > Ca 2+( l) + Cl 2( g) 
C)  CaCl 2( l)  2(l)    ? 
A)  CaCl 2( l)    Ca( l) + 2Cl -( l)  
B)  CaCl 2( l)    Ca 2+( l) + Cl 2( g)  
C)  CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  
D)  CaCl 2( l)    Ca( l) + Cl 2( g)  
E)  CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > Ca 2+( l) + 2Cl -( l) 
D)  CaCl 2( l)  2(l)    ? 
A)  CaCl 2( l)    Ca( l) + 2Cl -( l)  
B)  CaCl 2( l)    Ca 2+( l) + Cl 2( g)  
C)  CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  
D)  CaCl 2( l)    Ca( l) + Cl 2( g)  
E)  CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > Ca( l) + Cl 2( g) 
E)  CaCl 2( l)  2(l)    ? 
A)  CaCl 2( l)    Ca( l) + 2Cl -( l)  
B)  CaCl 2( l)    Ca 2+( l) + Cl 2( g)  
C)  CaCl 2( l)    Ca 2+( l) + 2Cl -( l)  
D)  CaCl 2( l)    Ca( l) + Cl 2( g)  
E)  CaCl 2( l)    CaCl( l) + Cl -( l) " class="answers-bank-image d-inline" rel="preload" > CaCl( l) + Cl -( l)  D

Question 18

Select the classification for the following reaction. Fe2+(aq)  + 2OH-(aq)  → Fe(OH) 2(s)

Accepted Answer

A)  Precipitation
B)  Acid-base
C)  Redox
D)  Decomposition
E)  None of these choices are correct.

Question 19

Predict the product(s)  for the following reaction. MgCO3(s)  3(s)    A) MgO 2( s) + CO( g)  B) MgO( s) + CO 2 C) Mg( s) + CO 2( g) + O 2( g)  D) Mg 2+( s) + CO 2( g) + O 2( g)  E) No reaction occurs." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  MgO 2( s) + CO( g) 
B)  MgO( s) + CO 2
C)  Mg( s) + CO 2( g) + O 2( g) 
D)  Mg 2+( s) + CO 2( g) + O 2( g) 
E)  No reaction occurs.

Question 20

Which one of the following is a redox reaction?

Accepted Answer

A)  2Na( g) + Cl 2( g) → 2NaCl( s) 
B)  Ba 2+( aq) + SO 4 2−( aq) → BaSO 4( s) 
C)  K 2Cr 2O 7( aq) + 2KOH( aq) → 2K 2CrO 4( aq) + H 2O( l) 
D)  Na 2CO 3( s) + 2HCl( aq) → 2NaCl( aq) + CO 2( g) + H 2O( l) 
E)  H 2O( l) → H +( aq) + OH −( aq)

Exam 4: Three Major Classes of Chemical Reactions

Which of the following will be least soluble in water?

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. NH3(aq) + HNO3(aq) → NH4NO3(aq)

Correct AnswerverifiedB

Calculate the oxidation number of the chlorine in perchloric acid, HClO4, a strong oxidizing agent.

Correct AnswerverifiedShow Answer

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles, ℳ = 139.04 g/mol) .

Correct AnswerverifiedShow Answer

Which, if any, of the following properties applies to weak acids?

Correct AnswerverifiedShow Answer

Select the correct set of products for the following reaction. Ba(OH) 2(aq) + HNO3(aq) →

Correct AnswerverifiedShow Answer

Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.

Correct AnswerverifiedShow Answer

How many mL of concentrated nitric acid (HNO3, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

Correct AnswerverifiedShow Answer

Reduction is the loss of electrons.

Correct AnswerverifiedShow Answer

What is the oxidation number of iodine in I2.

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. BaCl2(aq) + K2SO4(aq) → BaSO4(s) + 2KCl(aq)

Correct AnswerverifiedShow Answer

Some covalent compounds dissolve in water to produce conducting solutions.

Correct AnswerverifiedShow Answer

How many moles of H+(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

Correct AnswerverifiedShow Answer

Which one of the following ionic compounds is soluble in water?

Correct AnswerverifiedShow Answer

In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Correct AnswerverifiedFalse

Which of the following is a weak acid?

Correct AnswerverifiedShow Answer

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl2(l) ?

Correct AnswerverifiedD

Select the classification for the following reaction. Fe2+(aq) + 2OH-(aq) → Fe(OH) 2(s)

Correct AnswerverifiedShow Answer

Predict the product(s) for the following reaction. MgCO3(s)

Correct AnswerverifiedShow Answer

Which one of the following is a redox reaction?

Correct AnswerverifiedShow Answer

Correct Answer
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Select the classification for the following reaction. NH₃(aq) + HNO₃(aq) → NH₄NO₃(aq)

Correct Answer
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B

Calculate the oxidation number of the chlorine in perchloric acid, HClO₄, a strong oxidizing agent.

Correct Answer
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Correct Answer
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Correct Answer
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Select the correct set of products for the following reaction. Ba(OH) ₂(aq) + HNO₃(aq) →

Correct Answer
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Correct Answer
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How many mL of concentrated nitric acid (HNO₃, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

Correct Answer
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Correct Answer
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What is the oxidation number of iodine in I₂.

Correct Answer
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Select the classification for the following reaction. BaCl₂(aq) + K₂SO₄(aq) → BaSO₄(s) + 2KCl(aq)

Correct Answer
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Correct Answer
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How many moles of H⁺(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

Correct Answer
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Correct Answer
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Correct Answer
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False

Correct Answer
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Predict the products by completing a balanced equation for the following decomposition reaction. CaCl₂(l) ?

Correct Answer
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D

Select the classification for the following reaction. Fe²⁺(aq) + 2OH^-(aq) → Fe(OH) ₂(s)

Correct Answer
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Predict the product(s) for the following reaction. MgCO₃(s)

Correct Answer
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Correct Answer
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