Question 1

Which of the following is a weak acid?

Accepted Answer

A)  H 2SO 4
B)  HNO 3
C)  HF
D)  HBr
E)  HClF) A) and D)
G) A) and C)

Question 2

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.F) A) and C)
G) A) and D)

Question 3

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 MF) None of the above
G) A) and E)

Question 4

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 molF) A) and E)
G) A) and C)

Question 5

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) 2F) A) and D)
G) B) and D)

Question 6

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.F) D) and E)
G) C) and D)

Question 7

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 8

Some covalent compounds dissolve in water to produce conducting solutions.

Accepted Answer

A) True 
 B)False

Question 9

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 mLF) A) and B)
G) B) and E)

Question 10

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.F) B) and E)
G) A) and C) B

Question 11

Reduction is the loss of electrons.

Accepted Answer

A) True 
 B)False

Question 12

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) F) A) and B)
G) A) and C) D

Question 13

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.F) A) and B)
G) All of the above

Question 14

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.F) C) and E)
G) A) and D)

Question 15

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.F) A) and B)
G) A) and C)

Question 16

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) F) C) and D)
G) B) and D)

Question 17

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)  PbSF) B) and E)
G) A) and E)

Question 18

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.F) B) and E)
G) B) and D)

Question 19

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 6OF) B) and E)
G) C) and D)

Question 20

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.F) All of the above
G) B) and E)

Exam 4: Three Major Classes of Chemical Reactions

Which of the following is a weak acid?

Correct AnswerverifiedShow Answer

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

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

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

Some covalent compounds dissolve in water to produce conducting solutions.

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

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

Correct AnswerverifiedB

Reduction is the loss of electrons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

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

Correct AnswerverifiedShow Answer

Which one of the following is a redox reaction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following will be least soluble in water?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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False

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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?

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

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B

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

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D

What is the oxidation number of iodine in I₂.

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

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

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

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

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