Question 1

Reduction is the loss of electrons.

Accepted Answer

A) True 
 B)False

Question 2

An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Accepted Answer

Question 3

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

Question 4

All acid-base reactions produce a salt and water as the only products.

Accepted Answer

A) True 
 B)False

Question 5

Select the classification for the following reaction: KOH(aq)  + HCl(aq)   →\rightarrow→  KCl(aq)  + H2O(l)

Accepted Answer

A)   precipitation
B)   acid-base
C)   redox
D)   combination
E)   None of these choices is correct. F) B) and C)
G) A) and E)

Question 6

Select the classification for the following reaction: Na2O(s)  + H2O(l)   →\rightarrow→  2NaOH(aq)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   precipitation F) None of the above
G) A) and C)

Question 7

Which one of the following is a redox reaction?

Accepted Answer

A)   2Na(g)  + Cl2(g)   →\rightarrow→  2NaCl(s) 
B)   Ba2+(aq)  + SO42¯(aq)   →\rightarrow→  BaSO4(s) 
C)   K2Cr2O7(aq)  + 2KOH(aq)   →\rightarrow→ 2K2CrO4(aq)  + H2O(l) 
D)   Na2CO3(s)  + 2HCl(aq)   →\rightarrow→  2NaCl(aq)  + CO2(g)  + H2O(l) 
E)   H2O(l)   →\rightarrow→ H+(aq)  + OH¯(aq)  F) A) and B)
G) A) and C)

Question 8

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the iron(II)  hydroxide, Fe(OH) 2. Fe(OH) 2(s)  + CrO42¯(aq)   →\rightarrow→ Fe2O3(s)  + Cr(OH) 4¯(aq)  + H2O(l)  + OH¯(aq)

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   6 F) C) and E)
G) A) and B)

Question 9

A base

Accepted Answer

A)   causes phenolphthalein indicator to change from colorless to pink.
B)   donates a proton in a proton transfer reaction.
C)   accepts electrons in an electron transfer reaction.
D)   produces hydrogen ions in solution.
E)   does none of these choices.F) B) and C)
G) A) and E)

Question 10

Select the classification for the following reaction: 2H2O2(aq)   →\rightarrow→  2H2O(l)  + O2(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   None of these choices is correct. F) All of the above
G) D) and E)

Question 11

Select the classification for the following reaction:

Accepted Answer

A)   acid-base
B)   precipitation
C)   combination
D)   displacement
E)   decompositionF) All of the above
G) B) and C)

Question 12

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq)  + 2NaOH(aq)   →\rightarrow→ 2H2O(l)  + Na2SO4(aq)

Accepted Answer

A)   0.045 L
B)   0.28 L
C)   0.56 L
D)   0.90 L
E)   1.1 L F) A) and C)
G) D) and E)

Question 13

Sodium thiosulfate, Na2S2O3, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction of thiosulfate with iodine. 2S2O32¯(aq)  + I2(aq)   →\rightarrow→ S4O62¯(aq)  + 2I¯(aq)

Accepted Answer

A)   I2(aq) 
B)   I¯(aq) 
C)   S2O32¯(aq) 
D)   S4O62¯(aq) 
E)   S2O32¯(aq)  and I¯(aq)  F) None of the above
G) C) and D)

Question 14

In the following reaction, what ions, if any, are spectator ions? Pb(NO3) 2(aq)  + 2NaCl(aq)   →\rightarrow→ PbCl2(s)  + 2NaNO3(aq)

Accepted Answer

A)   Pb2+(aq) , Cl¯(aq) 
B)   Na+(aq) , NO3¯(aq) 
C)   Pb2+(aq) , NO3¯(aq) 
D)   Na+(aq) , Cl¯(aq) 
E)   There are no spectator ions in this reaction. F) A) and C)
G) B) and E)

Question 15

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the bromide anion, Br¯. Br2(aq)  + OH¯(aq)   →\rightarrow→ Br¯(aq)  + BrO3¯(aq)  + H2O(l)

Accepted Answer

A)   1
B)   2
C)   5
D)   6
E)   10 F) A) and C)
G) All of the above

Question 16

Predict the product(s)  for the following reaction: 2(s)  + CO(g)  B)  MgO(s)  + CO2 C)  Mg(s)  + CO2(g)  + O2(g)  D)  Mg2+(s)  + CO2(g)  + O2(g)  E)  No reaction occurs." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   MgO2(s)  + CO(g) 
B)   MgO(s)  + CO2
C)   Mg(s)  + CO2(g)  + O2(g) 
D)   Mg2+(s)  + CO2(g)  + O2(g) 
E)   No reaction occurs.F) A) and C)
G) B) and E)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)   precipitation
B)   acid-base
C)   redox
D)   decomposition
E)   None of these choices is correct. F) C) and D)
G) A) and C)

Question 19

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4) 3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)   KCl
B)   Na2SO4
C)   C6H12O6
D)   CO2
E)   (NH4) 3PO4F) A) and B)
G) A) and D)

Question 20

A) Explain or define what is meant by the term "oxidation."
B) Write down the oxidation numbers of all the atoms in the formulas K2Cr2O7 and NaH.

Accepted Answer

a. Oxidation: loss of electron...

Exam 4: Three Major Classes of Chemical Reactions

Select the classification for the following reaction: Na2O(s) + H2O(l) →\rightarrow→ 2NaOH(aq)

Correct AnswerverifiedShow Answer

Select the classification for the following reaction: KOH(aq) + HCl(aq) →\rightarrow→ KCl(aq) + H2O(l)

Correct AnswerverifiedShow Answer

Predict the product(s) for the following reaction:

Correct AnswerverifiedShow Answer

Select the classification for the following reaction:

Correct AnswerverifiedShow Answer

Select the classification for the following reaction: 2H2O2(aq) →\rightarrow→ 2H2O(l) + O2(g)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the bromide anion, Br¯. Br2(aq) + OH¯(aq) →\rightarrow→ Br¯(aq) + BrO3¯(aq) + H2O(l)

Correct AnswerverifiedShow Answer

An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct AnswerverifiedShow Answer

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the iron(II) hydroxide, Fe(OH) 2. Fe(OH) 2(s) + CrO42¯(aq) →\rightarrow→ Fe2O3(s) + Cr(OH) 4¯(aq) + H2O(l) + OH¯(aq)

Correct AnswerverifiedShow Answer

Which one of the following is a redox reaction?

Correct AnswerverifiedShow Answer

Reduction is the loss of electrons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A) Explain or define what is meant by the term "oxidation." B) Write down the oxidation numbers of all the atoms in the formulas K2Cr2O7 and NaH.

Correct Answerverifieda. Oxidation: loss of electron...View AnswerShow Answer

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4) 3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

Correct AnswerverifiedShow Answer

A base

Correct AnswerverifiedShow Answer

In the following reaction, what ions, if any, are spectator ions? Pb(NO3) 2(aq) + 2NaCl(aq) →\rightarrow→ PbCl2(s) + 2NaNO3(aq)

Correct AnswerverifiedShow Answer

Sodium thiosulfate, Na2S2O3, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction of thiosulfate with iodine. 2S2O32¯(aq) + I2(aq) →\rightarrow→ S4O62¯(aq) + 2I¯(aq)

Correct AnswerverifiedShow Answer

All acid-base reactions produce a salt and water as the only products.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq) →\rightarrow→ 2H2O(l) + Na2SO4(aq)

Correct AnswerverifiedShow Answer

Select the classification for the following reaction: Na₂O(s) + H₂O(l) $\rightarrow$ 2NaOH(aq)

Correct Answer
verified

Select the classification for the following reaction: KOH(aq) + HCl(aq) $\rightarrow$ KCl(aq) + H₂O(l)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Select the classification for the following reaction: 2H₂O₂(aq) $\rightarrow$ 2H₂O(l) + O₂(g)

Correct Answer
verified

Correct Answer
verified

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the bromide anion, Br^¯. Br₂(aq) + OH^¯(aq) $\rightarrow$ Br^¯(aq) + BrO₃^¯(aq) + H₂O(l)

Correct Answer
verified

An aqueous solution of lead nitrate, Pb(NO₃)₂, is mixed with one of sodium chromate, Na₂CrO₄, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct Answer
verified

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the iron(II) hydroxide, Fe(OH) ₂. Fe(OH) ₂(s) + CrO₄^2¯(aq) $\rightarrow$ Fe₂O₃(s) + Cr(OH) ₄^¯(aq) + H₂O(l) + OH^¯(aq)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A) Explain or define what is meant by the term "oxidation." B) Write down the oxidation numbers of all the atoms in the formulas K₂Cr₂O₇ and NaH.

Correct Answer
verified
a. Oxidation: loss of electron...
View Answer

Potassium chloride, KCl, sodium sulfate, Na₂SO₄, glucose, C₆H₁₂O₆, carbon dioxide, CO₂ and ammonium phosphate, (NH₄) ₃PO₄, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

Correct Answer
verified

Correct Answer
verified

In the following reaction, what ions, if any, are spectator ions? Pb(NO₃) ₂(aq) + 2NaCl(aq) $\rightarrow$ PbCl₂(s) + 2NaNO₃(aq)

Correct Answer
verified

Sodium thiosulfate, Na₂S₂O₃, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction of thiosulfate with iodine. 2S₂O₃^2¯(aq) + I₂(aq) $\rightarrow$ S₄O₆^2¯(aq) + 2I^¯(aq)

Correct Answer
verified

Correct Answer
verified

Select the classification for the following reaction: BaCl₂(aq) + K₂SO₄(aq) $\rightarrow$ BaSO₄(s) + 2KCl(aq)

Correct Answer
verified

Automobile batteries use 3.0 M H₂SO₄ as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H₂SO₄(aq) + 2NaOH(aq) $\rightarrow$ 2H₂O(l) + Na₂SO₄(aq)

Correct Answer
verified