Question 1

In both of the following reactions,a precipitate is formed.Complete and balance the equations,showing the phases of the products.
a.BaCl2(aq)+ Na2SO4(aq) $\to$
b.Mg(NO3)2(aq)+ KOH(aq) $\to$

Accepted Answer

a.BaCl₂(aq)+ Na

Question 2

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

Accepted Answer

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

Question 3

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)   →	o→  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 4

Select the classification for the following reaction.
2H2O2(aq)   →	o→  2H2O(l) + O2(g)

Accepted Answer

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

Question 5

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,+3F) B) and E)
G) None of the above

Question 6

Select the classification for the following reaction.
CaCl2·H2O(s)  2·H2O(s)    CaCl2(s) + H2O(g)  A) combination B) decomposition C) displacement D) acid-base E) precipitation" class="answers-bank-image d-inline" rel="preload" >
CaCl2(s) + H2O(g)

Accepted Answer

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

Question 7

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

Accepted Answer

a.Oxidation: loss of...

Question 8

Calculate the oxidation number of sulfur in sodium metabisulfite,Na2S2O5.

Accepted Answer

A)  -2
B)  +2
C)  +4
D)  +5
E)  None of these is the correct oxidation number.F) B) and E)
G) None of the above

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

In each of the following cases,write down the oxidation number of the indicated atom.
a.P in P4
b.C in C2H6
 c.S in H2SO4
 d.Mn in MnO4-
 e.S in S4O62-
 f.P in Na3PO4

Accepted Answer

a.0
b.-3
c...

Question 11

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) $\to$
b.NaOH(aq)+ Fe(NO3)3(aq)$\to$

Accepted Answer

a.2AgNO₃(aq)+ CaCl<...

Question 12

Which one of the following is not a redox reaction?

Accepted Answer

A)  2H2(g) + O2(g)   →	o→  2H2O(l) 
B)  Zn(s) + H2SO4(aq)   →	o→  ZnSO4(aq) + H2(g) 
C)  H2O(l) + NH3(g)   →	o→  NH4+(aq) + OH-(aq) 
D)  6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq)   →	o→ Cr2(SO4) 3(aq) + 3Fe2(SO4) 3(aq) + K2SO4(aq) + 7H2O(l) 
E)  Cl2(g) + 2KBr(aq)   →	o→  Br2(l) + 2KCl(aq)  F) C) and D)
G) A) and E)

Question 13

Which one of the following is not a redox reaction?

Accepted Answer

A)  2Na(s) + 2H2O(l)   →	o→  2NaOH(aq) + H2(g) 
B)  H2(g) + Cl2(g)   →	o→  2HCl(g) 
C)  2H2O2(aq)   →	o→  2H2O(l) + O2(g) 
D)  Fe2O3(s) + 3H2SO4(aq)   →	o→  Fe2(SO4) 3(aq) + 3H2O(l) 
E)  2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq)   →	o→ K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4) 3(aq) + 8H2O(l)  F) A) and E)
G) None of the above

Question 14

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) B) and D)

Question 15

Which of the following is a weak acid?

Accepted Answer

A)  H2SO4
B)  HNO3
C)  HF
D)  HBr
E)  HClF) B) and C)
G) C) and D)

Question 16

Which one of the following is a redox reaction?

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

Select the classification for the following reaction.
2NaCl(l)  2(g)  A) acid-base B) precipitation C) combination D) displacement E) decomposition" class="answers-bank-image d-inline" rel="preload" >
2Na(l) + Cl2(g)

Accepted Answer

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

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Exam 4: Three Major Classes of Chemical Reactions

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) →\to→ 2H2O(l) + Na2SO4(aq)

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

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Which one of the following is not a redox reaction?

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Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl2(g)

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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) →\to→ b.NaOH(aq)+ Fe(NO3)3(aq) →\to→

Correct Answerverifieda.2AgNO3(aq)+ CaCl<...View AnswerShow Answer

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

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In each of the following cases,write down the oxidation number of the indicated atom. a.P in P4 b.C in C2H6 c.S in H2SO4 d.Mn in MnO4- e.S in S4O62- f.P in Na3PO4

Correct Answerverifieda.0b.-3c...View AnswerShow Answer

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

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

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Calculate the oxidation number of sulfur in sodium metabisulfite,Na2S2O5.

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Which one of the following is a redox reaction?

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Which one of the following is not a redox reaction?

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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?

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

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

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

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Which of the following is a weak acid?

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

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

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Select the classification for the following reaction. CaCl2·H2O(s) CaCl2(s) + H2O(g)

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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.BaCl2(aq)+ Na2SO4(aq) →\to→ b.Mg(NO3)2(aq)+ KOH(aq) →\to→

Correct Answerverifieda.BaCl2(aq)+ NaView AnswerShow 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) $\to$ 2H₂O(l) + Na₂SO₄(aq)

Correct Answer
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Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl₂(g)

Correct Answer
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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) $\to$ b.NaOH(aq)+ Fe(NO₃)₃(aq) $\to$

Correct Answer
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a.2AgNO₃(aq)+ CaCl<...
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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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In each of the following cases,write down the oxidation number of the indicated atom. a.P in P₄ b.C in C₂H₆ c.S in H₂SO₄ d.Mn in MnO₄^- e.S in S₄O₆^2- f.P in Na₃PO₄

Correct Answer
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a.0
b.-3
c...
View Answer

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

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

Correct Answer
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Calculate the oxidation number of sulfur in sodium metabisulfite,Na₂S₂O₅.

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

Correct Answer
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Correct Answer
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Select the classification for the following reaction. KOH(aq) + HCl(aq) $\to$ KCl(aq) + H₂O(l)

Correct Answer
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Select the classification for the following reaction. 2H₂O₂(aq) $\to$ 2H₂O(l) + O₂(g)

Correct Answer
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Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

Correct Answer
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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.BaCl₂(aq)+ Na₂SO₄(aq) $\to$ b.Mg(NO₃)₂(aq)+ KOH(aq) $\to$

Correct Answer
verified
a.BaCl₂(aq)+ Na
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