Question 1

An acid

Accepted Answer

A)   produces hydroxide ions when dissolved in water.
B)   changes the color of phenolphthalein indicator from colorless to pink.
C)   donates electrons in an electron transfer reaction.
D)   donates protons in a proton transfer reaction.
E)   None of these choices are correct.F) A) and E)
G) C) and D)

Question 2

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Accepted Answer

A)   donating a proton to an acid molecule.
B)   donating a proton to a water molecule.
C)   donating a hydrogen ion to a water molecule.
D)   accepting an electron from an acid molecule.
E)   accepting a proton from a water molecule.F) A) and B)
G) A) and C)

Question 3

Oxidation is associated with an increase in oxidation number.

Accepted Answer

A) True 
 B)False

Question 4

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq)  + (NH4) 3PO4(aq)  →

Accepted Answer

A)   cobalt(II)  phosphate, Co3(PO4) 2
B)   cobalt(III)  phosphate, Co3(PO4) 2
C)   cobalt(II)  phosphate, CoPO4
D)   cobalt(III)  phosphate, CoPO4
E)   ammonium sulfate, (NH4) 2SO4F) B) and E)
G) A) and C)

Question 5

Predict the product(s)  for the following reaction. BaO(s)  + CO2(g)  →

Accepted Answer

A)   Ba(s)  + CO3(g) 
B)   BaCO3(s) 
C)   BaO(s)  + C(s) 
D)   Ba(s)  + CO32-(s) 
E)   No reaction occurs.F) B) and E)
G) A) and C)

Question 6

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 ( 3 (   = 106.45 g/mol) . A)  419 g B)  169 g C)  0.419 g D)  0.169 g E)  0.00394 g" class="answers-bank-image d-inline" rel="preload" > = 106.45 g/mol) .

Accepted Answer

A)   419 g
B)   169 g
C)   0.419 g
D)   0.169 g
E)   0.00394 gF) A) and D)
G) B) and D)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A)   K2SO4(aq)  + H2O(l) 
B)   K2S(aq)  + H2O(l) 
C)   K(s)  + H2(g)  + SO3(g) 
D)   KSO4(aq)  + H2O(l) 
E)   No reaction occurs.F) A) and C)
G) All of the above

Question 9

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl2(l)  2(l)    ? A)  CaCl2(l)    Ca(l)  + 2Cl-(l)  B)  CaCl2(l)    Ca2+(l)  + Cl2(g)  C)  CaCl2(l)    Ca2+(l)  + 2Cl-(l)  D)  CaCl2(l)    Ca(l)  + Cl2(g)  E)  CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > ?

Accepted Answer

A)   CaCl2(l)  2(l)    ? 
A)   CaCl2(l)    Ca(l)  + 2Cl-(l)  
B)   CaCl2(l)    Ca2+(l)  + Cl2(g)  
C)   CaCl2(l)    Ca2+(l)  + 2Cl-(l)  
D)   CaCl2(l)    Ca(l)  + Cl2(g)  
E)   CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > Ca(l)  + 2Cl-(l) 
B)   CaCl2(l)  2(l)    ? 
A)   CaCl2(l)    Ca(l)  + 2Cl-(l)  
B)   CaCl2(l)    Ca2+(l)  + Cl2(g)  
C)   CaCl2(l)    Ca2+(l)  + 2Cl-(l)  
D)   CaCl2(l)    Ca(l)  + Cl2(g)  
E)   CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > Ca2+(l)  + Cl2(g) 
C)   CaCl2(l)  2(l)    ? 
A)   CaCl2(l)    Ca(l)  + 2Cl-(l)  
B)   CaCl2(l)    Ca2+(l)  + Cl2(g)  
C)   CaCl2(l)    Ca2+(l)  + 2Cl-(l)  
D)   CaCl2(l)    Ca(l)  + Cl2(g)  
E)   CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > Ca2+(l)  + 2Cl-(l) 
D)   CaCl2(l)  2(l)    ? 
A)   CaCl2(l)    Ca(l)  + 2Cl-(l)  
B)   CaCl2(l)    Ca2+(l)  + Cl2(g)  
C)   CaCl2(l)    Ca2+(l)  + 2Cl-(l)  
D)   CaCl2(l)    Ca(l)  + Cl2(g)  
E)   CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > Ca(l)  + Cl2(g) 
E)   CaCl2(l)  2(l)    ? 
A)   CaCl2(l)    Ca(l)  + 2Cl-(l)  
B)   CaCl2(l)    Ca2+(l)  + Cl2(g)  
C)   CaCl2(l)    Ca2+(l)  + 2Cl-(l)  
D)   CaCl2(l)    Ca(l)  + Cl2(g)  
E)   CaCl2(l)    CaCl(l)  + Cl-(l) " class="answers-bank-image d-inline" rel="preload" > CaCl(l)  + Cl-(l) F) D) and E)
G) A) and E)

Question 10

All combustion reactions are classified as combination reactions.

Accepted Answer

A) True 
 B)False

Question 11

Select the classification for the following reaction. Fe(s)  + 2Fe3+(aq)  → 3Fe2+(aq)

Accepted Answer

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

Question 12

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 13

Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid. LiOH(aq)  + HBr(aq)  → H2O(l)  + LiBr(aq)

Accepted Answer

A)   LiOH(aq)  → Li+(aq)  + OH-(aq) 
B)   HBr(aq)  → H+(aq)  + Br-(aq) 
C)   H+(aq)  + OH-(aq)  → H2O(l) 
D)   Li+(aq)  + Br-(aq)  → LiBr(aq) 
E)   Li+(aq)  + OH-(aq)  + H+(aq)  + Br-(aq)  → H2O(l)  + LiBr(aq) F) B) and D)
G) All of the above

Question 14

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 → 6CO2 + 6H2O

Accepted Answer

A)   Hydrogen in C6H12O6 is being reduced.
B)   Oxygen in O2 is being oxidized.
C)   Hydrogen in C6H12O6 is the reducing agent.
D)   Oxygen in C6H12O6 is the oxidizing agent.
E)   Carbon in C6H12O6 is being oxidized.F) A) and E)
G) B) and E)

Question 15

1.0 M aqueous solutions of the following substances are prepared. Which one would you expect to have the lowest electrical conductivity?

Accepted Answer

A)   NaOH
B)   CH3CH2OH (ethanol) 
C)   KBr
D)   CH3COOH (acetic acid) 
E)   HClO4F) B) and E)
G) None of the above

Question 16

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Accepted Answer

A) True 
 B)False

Question 17

Select the classification for the following reaction. 2I-(aq)  + Cl2(aq)  → I2(aq)  + 2Cl-(aq)

Accepted Answer

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

Question 18

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( 3 (   = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)  → NaCl(s)  + H2O(l)  + CO2(g)  A)  638 mL B)  572 mL C)  536 mL D)  276 mL E)  175 mL" class="answers-bank-image d-inline" rel="preload" > = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)  → NaCl(s)  + H2O(l)  + CO2(g)

Accepted Answer

A)   638 mL
B)   572 mL
C)   536 mL
D)   276 mL
E)   175 mLF) B) and E)
G) C) and E)

Question 19

Which of the following solutions will be the best conductor of electrical current?

Accepted Answer

A)   methyl alcohol, CH3OH(aq) 
B)   glucose, C6H12O6(aq) 
C)   potassium chloride, KCl(aq) 
D)   bromine, Br2(aq) 
E)   ethylene glycol, C2H6O2(aq) F) B) and D)
G) B) and C)

Question 20

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 B)
G) B) and E)

Exam 4: Three Major Classes of Chemical Reactions

The combustion of an element is always a combination reaction.

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All combustion reactions are classified as combination reactions.

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Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 ( = 106.45 g/mol) .

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How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( = 84.02 g/mol) ? HCl(aq) + NaHCO3(s) → NaCl(s) + H2O(l) + CO2(g)

Correct AnswerverifiedShow Answer

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 → 6CO2 + 6H2O

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Oxidation is associated with an increase in oxidation number.

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Select the classification for the following reaction. Fe(s) + 2Fe3+(aq) → 3Fe2+(aq)

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Predict the product(s) for the following reaction. BaO(s) + CO2(g) →

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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4) 3PO4(aq) →

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Which of the following solutions will be the best conductor of electrical current?

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Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid. LiOH(aq) + HBr(aq) → H2O(l) + LiBr(aq)

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A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

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Ammonia, NH3, produces hydroxide ions in aqueous solution by

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An acid

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1.0 M aqueous solutions of the following substances are prepared. Which one would you expect to have the lowest electrical conductivity?

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

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Select the classification for the following reaction. 2I-(aq) + Cl2(aq) → I2(aq) + 2Cl-(aq)

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

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

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Correct Answer
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Correct Answer
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Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃ ( = 106.45 g/mol) .

Correct Answer
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How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃ ( = 84.02 g/mol) ? HCl(aq) + NaHCO₃(s) → NaCl(s) + H₂O(l) + CO₂(g)

Correct Answer
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Which of the statements below correctly describes the combustion of glucose, shown below? C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

Correct Answer
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Correct Answer
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Select the classification for the following reaction. Fe(s) + 2Fe₃₊(aq) → 3Fe₂₊(aq)

Correct Answer
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Predict the product(s) for the following reaction. BaO(s) + CO₂(g) →

Correct Answer
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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO₄(aq) + (NH₄) ₃PO₄(aq) →

Correct Answer
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Correct Answer
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Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid. LiOH(aq) + HBr(aq) → H₂O(l) + LiBr(aq)

Correct Answer
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Correct Answer
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Ammonia, NH₃, produces hydroxide ions in aqueous solution by

Correct Answer
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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. 2I_-(aq) + Cl₂(aq) → I₂(aq) + 2Cl_-(aq)

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

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

Correct Answer
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