Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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) B) and E)
G) C) and E)

Question 3

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) C) and D)
G) A) and D)

Question 4

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 B)
G) All of the above

Question 5

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 B)
G) B) and D)

Question 6

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 7

Oxidation is associated with an increase in oxidation number.

Accepted Answer

A) True 
 B)False

Question 8

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) A) and B)
G) None of the above

Question 9

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) B) and D)
G) A) and D)

Question 10

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 D)
G) A) and E)

Question 11

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) C) and E)
G) A) and B)

Question 12

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

All combustion reactions are classified as combination reactions.

Accepted Answer

A) True 
 B)False

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) A) and C)
G) A) and D)

Question 16

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) None of the above
G) D) and E)

Question 17

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

Question 18

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) All of the above
G) C) and E)

Question 19

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) C) and D)
G) D) and E)

Question 20

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) D) and E)

Exam 4: Three Major Classes of Chemical Reactions

All combustion reactions are classified as combination reactions.

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

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

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Oxidation is associated with an increase in oxidation number.

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

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

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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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An acid

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

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

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

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

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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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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

The combustion of an element is always a combination reaction.

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Ammonia, NH3, produces hydroxide ions in aqueous solution by

Correct AnswerverifiedShow Answer

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

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

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

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

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

Correct Answer
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