Question 1

Which of the following is a weak base?

Accepted Answer

A)   NH3
B)   Ca(OH) 2
C)   Ba(OH) 2
D)   NaOH
E)   CH3COOHF) A) and E)
G) A) and D)

Question 2

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq)  + LiOH(aq)   →\rightarrow→

Accepted Answer

A)   LiCH3COO
B)   Li(CH3COO) 2
C)   MgOH
D)   Mg(OH) 2
E)   CH3OH F) A) and C)
G) A) and B)

Question 3

Select the classification for the following reaction: H2(g)  + Cl2(g)   →\rightarrow→ 2HCl(g)

Accepted Answer

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

Question 4

Balance the redox equation 
$ \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}(a q)+\mathrm{HI}(a q) \rightarrow \mathrm{KI}(a q)+\mathrm{CrI}_{3}(a q)+\mathrm{I}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(l) $

Accepted Answer

The answer of Balance the redox equation 
\( \mathrm{K}_{2} \mathrm{Cr}_{2}...

Question 5

Oxidation is associated with an increase in oxidation number.

Accepted Answer

A) True 
 B)False

Question 6

Identify all the spectator ions in the following reaction. 2KMnO4(aq)  + 10FeSO4(aq)  + 8H2SO4(aq)   →\rightarrow→ 
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) All of the above
G) C) and D)

Question 7

A) Define "oxidation."
B) Identify the oxidizing and reducing agents in the following (unbalanced) equation. $ \mathrm{HNO}_{3}(a q)+\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}(a q)+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}(a q) \rightarrow $
$ \mathrm{KNO}_{3}(a q)+\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}(a q)+\mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cr}\left(\mathrm{NO}_{3}\right)_{3}(a q) $

Accepted Answer

a. Oxidation: loss of electron...

Question 8

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

Question 9

Predict the products by completing a balanced equation for the following decomposition reaction. 2(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)    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)    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)    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)    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)    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 D)
G) B) and E)

Question 10

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Accepted Answer

A)   0.0524 M
B)   0.888 M
C)   1.13 M
D)   2.26 M
E)   2.43 MF) A) and C)
G) All of the above

Question 11

Predict the product(s)  for the following reaction: 3(g)  B)  BaCO3(s)  C)  BaO(s)  + C(s)  D)  Ba(s)  + CO32¯(s)  E)  No reaction occurs." class="answers-bank-image d-inline" rel="preload" >

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

Question 12

Which one of the following substances is the best electrolyte?

Accepted Answer

A)   CO
B)   CH3Cl
C)   CH4
D)   C2H5OH
E)   HClF) D) and E)
G) A) and B)

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is a weak acid?

Accepted Answer

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

Question 15

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)   →\rightarrow→ CaC2O4(s)  + 2Na+(aq)

Accepted Answer

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

Question 16

Select the net ionic equation for the reaction between sodium chloride and mercury(I)  nitrate. 2NaCl(aq)  + Hg2(NO3) 2(aq)   →\rightarrow→ NaNO3(aq)  + Hg2Cl2(s)

Accepted Answer

A)   Na+(aq)  + NO3¯(aq)   →\rightarrow→  NaNO3(aq) 
B)   Hg22+(aq)  + 2Cl¯(aq)  →\rightarrow→ Hg2Cl2(s) 
C)   NaCl(aq)   →\rightarrow→ Na+(aq)  + Cl¯(aq) 
D)   Hg2(NO3) 2(aq)   →\rightarrow→ Hg22+(aq)  + 2NO3¯(aq) 
E)   Hg22+(aq)   →\rightarrow→ Hg2(s)  F) C) and E)
G) B) and D)

Question 17

A combination reaction may also be a displacement reaction.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

Covalent compounds, dissolved in water, never produce conducting solutions.

Accepted Answer

A) True 
 B)False

Question 20

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq)  + BaCl2(aq)   →\rightarrow→

Accepted Answer

A)   Ba2CO3
B)   BaCO3
C)   NaCl
D)   NaCl2
E)   BaO F) A) and B)
G) C) and D)

Exam 4: Three Major Classes of Chemical Reactions

Select the classification for the following reaction: H₂(g) + Cl₂(g) $\rightarrow$ 2HCl(g)

Correct Answer
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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?

Correct Answer
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Predict the product(s) for the following reaction:

Correct Answer
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Balance the redox equation $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}(a q)+\mathrm{HI}(a q) \rightarrow \mathrm{KI}(a q)+\mathrm{CrI}_{3}(a q)+\mathrm{I}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(l)$

Correct Answer
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Covalent compounds, dissolved in water, never produce conducting solutions.

Correct Answer
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A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Correct Answer
verified

Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) $\rightarrow$

Correct Answer
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A combination reaction may also be a displacement reaction.

Correct Answer
verified

Oxidation is associated with an increase in oxidation number.

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) $\rightarrow$

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

Predict the products by completing a balanced equation for the following decomposition reaction.

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

Correct Answer
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Which one of the following substances is the best electrolyte?

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

Correct Answer
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Which of the following is a weak base?

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

Correct Answer
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Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg₂(NO₃) ₂(aq) $\rightarrow$ NaNO₃(aq) + Hg₂Cl₂(s)

Correct Answer
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Which of the following is a weak acid?

Correct Answer
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Exam 4: Three Major Classes of Chemical Reactions

Select the classification for the following reaction: H2(g) + Cl2(g) →\rightarrow→ 2HCl(g)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Predict the product(s) for the following reaction:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Covalent compounds, dissolved in water, never produce conducting solutions.

Correct AnswerverifiedShow Answer

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq) + LiOH(aq) →\rightarrow→

Correct AnswerverifiedShow Answer

A combination reaction may also be a displacement reaction.

Correct AnswerverifiedShow Answer

Oxidation is associated with an increase in oxidation number.

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq) + BaCl2(aq) →\rightarrow→

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Predict the products by completing a balanced equation for the following decomposition reaction.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which one of the following substances is the best electrolyte?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a weak base?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg2(NO3) 2(aq) →\rightarrow→ NaNO3(aq) + Hg2Cl2(s)

Correct AnswerverifiedShow Answer

Which of the following is a weak acid?

Correct AnswerverifiedShow Answer

Select the classification for the following reaction: H₂(g) + Cl₂(g) $\rightarrow$ 2HCl(g)

Correct Answer
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Correct Answer
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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 precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) $\rightarrow$

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) $\rightarrow$

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

Correct Answer
verified

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

Correct Answer
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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 net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg₂(NO₃) ₂(aq) $\rightarrow$ NaNO₃(aq) + Hg₂Cl₂(s)

Correct Answer
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Correct Answer
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