Question 1

The compound P4O10is used in refining sugar. Select the classification for the reaction in which it is synthesized. P4(s)  + 5O2(g)   →\rarr→ P4O10(s)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   precipitation F) A) and C)
G) C) and E)

Question 2

Identify all the spectator ions in the following reaction. 
2KMnO4(aq)  + 10FeSO4(aq)  + 8H2SO4(aq)   K2SO4(aq)  + 2MnSO4(aq)  + 5Fe2(SO4) 3(aq)  + 8H2O(l)

Accepted Answer

A)   only K+
B)   only SO42-
C)   only K+ and SO42-
D)   only K+, SO42-, and Fe2+
E)   only K+, SO42-, Fe2+, and Mn2+F) A) and B)
G) B) and C)

Question 3

a. Define "oxidation".
b. Identify the oxidizing and reducing agents in the following (unbalanced) equation.
HNO3(aq) + C2H6O(aq) + K2Cr2O7(aq) F1F1F1S1F1F1F10 KNO3(aq) + C2H4O(aq) + H2O(l) + Cr(NO3)3(aq)

Accepted Answer

a. Oxidation: loss of electron...

Question 4

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 the above
E)   none of the aboveF) C) and D)
G) B) and E)

Question 5

Select the classification for the following reaction. KOH(aq)  + HCl(aq)   KCl(aq)  + H2O(l)

Accepted Answer

A)   precipitation
B)   acid-base
C)   redox
D)   combination
E)   none of the aboveF) B) and C)
G) B) and E)

Question 6

The amount of calcium present in milk can be determined by adding oxalate to a sample and measuring the mass of calcium oxalate precipitated. What is the mass percent of calcium if 0.429 g of calcium oxalate forms in a 125-g sample of milk when excess aqueous sodium oxalate is added? Na2C2O4(aq)  + Ca2+(aq)   CaC2O4(s)  + 2Na+(aq)

Accepted Answer

A)   0.107%
B)   0.202%
C)   0.343%
D)   1.10%
E)   1.37%F) B) and E)
G) B) and C)

Question 7

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products.
a. AgNO3(aq) + CaCl2(aq) F1F1F1S1F1F1F10
b. NaOH(aq) + Fe(NO3)3(aq) F1F1F1S1F1F1F10

Accepted Answer

a. 2AgNO₃(aq) + CaCl₂(aq) F1F1F1...

Question 8

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Accepted Answer

A)   2.543 mol
B)   1.383 mol
C)   0.7232 mol
D)   0.3932 mol
E)   0.001383 molF) None of the above
G) B) and D)

Question 9

What is the oxidation number of iodine in I2.

Accepted Answer

A)   -1
B)   0
C)   +1
D)   +7
E)   None of the above is the correct oxidation number.F) None of the above
G) C) and D)

Question 10

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Accepted Answer

A)   0.184%
B)   1.63%
C)   3.26%
D)   5.43%
E)   9.23%F) A) and B)
G) C) and E)

Question 11

The oxidation numbers of P, S, and Cl in H2PO2-, H2S, and KClO4 are, respectively

Accepted Answer

A)   -1, -1, +3.
B)   +1, -2, +7.
C)   +1, +2, +7.
D)   -1, -2, +7.
E)   -1, -2, +3.F) A) and B)
G) A) and C)

Question 12

Which one of the following is a redox reaction?

Accepted Answer

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

Question 13

a. Explain or define what is meant by the term "oxidation."
b. Write down the oxidation numbers of all the atoms in the following formulas.
K2Cr2O7 NaH

Accepted Answer

a. Oxidation: loss o...

Question 14

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

Accepted Answer

A)   330 mL
B)   210 mL
C)   86 mL
D)   60 mL
E)   7.3 mLF) B) and C)
G) C) and D)

Question 15

Predict the product(s)  for the following reaction. MgCO3(s)  3(s)    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." 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) B) and D)
G) C) and D)

Question 16

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

Question 17

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 E)
G) C) and D)

Question 18

Identify the oxidizing agent in the following redox reaction. 
Hg2+(aq)  + Cu(s)   Cu2+(aq)  + Hg(l)

Accepted Answer

A)   Hg2+(aq) 
B)   Cu(s) 
C)   Cu2+(aq) 
D)   Hg(l) 
E)   Hg2+(aq)  and Cu2+(aq) F) A) and B)
G) A) and C)

Question 19

Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II)  nitrate.

Accepted Answer

A)   CuS
B)   Cu2S
C)   NH4NO3
D)   NH4(NO3) 2
E)   CuSO4F) B) and C)
G) None of the above

Question 20

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 the above.F) A) and E)
G) A) and B)

Exam 4: The Major Classes of Chemical Reactions

a. Explain or define what is meant by the term "oxidation." b. Write down the oxidation numbers of all the atoms in the following formulas. K₂Cr₂O₇NaH

Correct Answer
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a. Oxidation: loss o...
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In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. a. AgNO₃(aq) + CaCl₂(aq)  b. NaOH(aq) + Fe(NO₃)₃(aq) 

Correct Answer
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a. 2AgNO₃(aq) + CaCl₂(aq) F1F1F1...
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What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

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. KOH(aq) + HCl(aq)  KCl(aq) + H₂O(l)

Correct Answer
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The oxidation numbers of P, S, and Cl in H₂PO₂^-, H₂S, and KClO₄ are, respectively

Correct Answer
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Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Correct Answer
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a. Define "oxidation". b. Identify the oxidizing and reducing agents in the following (unbalanced) equation. HNO₃(aq) + C₂H₆O(aq) + K₂Cr₂O₇(aq)  KNO₃(aq) + C₂H₄O(aq) + H₂O(l) + Cr(NO₃)₃(aq)

Correct Answer
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a. Oxidation: loss of electron...
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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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Which one of the following is a redox reaction?

Correct Answer
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Identify all the spectator ions in the following reaction. 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq)  K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄) ₃(aq) + 8H₂O(l)

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

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Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate.

Correct Answer
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Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

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

Correct Answer
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A base

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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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Identify the oxidizing agent in the following redox reaction. Hg²⁺(aq) + Cu(s)  Cu²⁺(aq) + Hg(l)

Correct Answer
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The compound P₄O₁₀is used in refining sugar. Select the classification for the reaction in which it is synthesized. P₄(s) + 5O₂(g) $\rarr$ P₄O₁₀(s)

Correct Answer
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Exam 4: The Major Classes of Chemical Reactions

a. Explain or define what is meant by the term "oxidation." b. Write down the oxidation numbers of all the atoms in the following formulas. K2Cr2O7 NaH

Correct Answerverifieda. Oxidation: loss o...View AnswerShow Answer

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. a. AgNO3(aq) + CaCl2(aq)  b. NaOH(aq) + Fe(NO3)3(aq) 

Correct Answerverifieda. 2AgNO3(aq) + CaCl2(aq) F1F1F1...View AnswerShow Answer

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

Correct AnswerverifiedShow Answer

What is the oxidation number of iodine in I2.

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Select the classification for the following reaction. KOH(aq) + HCl(aq)  KCl(aq) + H2O(l)

Correct AnswerverifiedShow Answer

The oxidation numbers of P, S, and Cl in H2PO2-, H2S, and KClO4 are, respectively

Correct AnswerverifiedShow Answer

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Correct AnswerverifiedShow Answer

a. Define "oxidation". b. Identify the oxidizing and reducing agents in the following (unbalanced) equation. HNO3(aq) + C2H6O(aq) + K2Cr2O7(aq)  KNO3(aq) + C2H4O(aq) + H2O(l) + Cr(NO3)3(aq)

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

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

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Which one of the following is a redox reaction?

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Identify all the spectator ions in the following reaction. 2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq)  K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4) 3(aq) + 8H2O(l)

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

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Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate.

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Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Correct AnswerverifiedShow Answer

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

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A base

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

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Correct AnswerverifiedShow Answer

Identify the oxidizing agent in the following redox reaction. Hg2+(aq) + Cu(s)  Cu2+(aq) + Hg(l)

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The compound P4O10is used in refining sugar. Select the classification for the reaction in which it is synthesized. P4(s) + 5O2(g) →\rarr→ P4O10(s)

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a. Explain or define what is meant by the term "oxidation." b. Write down the oxidation numbers of all the atoms in the following formulas. K₂Cr₂O₇NaH

Correct Answer
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a. Oxidation: loss o...
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In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. a. AgNO₃(aq) + CaCl₂(aq)  b. NaOH(aq) + Fe(NO₃)₃(aq) 

Correct Answer
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a. 2AgNO₃(aq) + CaCl₂(aq) F1F1F1...
View Answer

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

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Select the classification for the following reaction. KOH(aq) + HCl(aq)  KCl(aq) + H₂O(l)

Correct Answer
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The oxidation numbers of P, S, and Cl in H₂PO₂^-, H₂S, and KClO₄ are, respectively

Correct Answer
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Correct Answer
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a. Define "oxidation". b. Identify the oxidizing and reducing agents in the following (unbalanced) equation. HNO₃(aq) + C₂H₆O(aq) + K₂Cr₂O₇(aq)  KNO₃(aq) + C₂H₄O(aq) + H₂O(l) + Cr(NO₃)₃(aq)

Correct Answer
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a. Oxidation: loss of electron...
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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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Identify all the spectator ions in the following reaction. 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq)  K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄) ₃(aq) + 8H₂O(l)

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

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Correct Answer
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Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Correct Answer
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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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Identify the oxidizing agent in the following redox reaction. Hg²⁺(aq) + Cu(s)  Cu²⁺(aq) + Hg(l)

Correct Answer
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The compound P₄O₁₀is used in refining sugar. Select the classification for the reaction in which it is synthesized. P₄(s) + 5O₂(g) $\rarr$ P₄O₁₀(s)

Correct Answer
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