Question 1

Select the precipitate that forms when aqueous lead(II)  nitrate reacts with aqueous sodium sulfate.

Accepted Answer

A)   NaNO3
B)   Na2NO3
C)   PbSO4
D)   Pb2SO4
E)   PbSF) A) and B)
G) A) and E)

Question 2

What is the oxidation number of iodine in I2.

Accepted Answer

A)   -1
B)   0
C)   +1
D)   +7
E)   None of these choices is correct.F) A) and B)
G) A) and C)

Question 3

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4) 3PO4, is dissolved in water?

Accepted Answer

A)   0.40 mol
B)   1.6 mol
C)   3.2 mol
D)   4.8 mol
E)   6.4 molF) A) and E)
G) B) and E)

Question 4

Which one of the following substances is a strong acid?

Accepted Answer

A)   HNO3
B)   H2CO3
C)   NH3
D)   CH3COOH
E)   H3PO4F) B) and E)
G) B) and D)

Question 5

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq)  + Na2CO3(aq)   →\rightarrow→

Accepted Answer

A)   copper(I)  carbonate, Cu2CO3
B)   copper(II)  carbonate, Cu2CO3
C)   copper(I)  carbonate, CuCO3
D)   copper(II)  carbonate, CuCO3
E)   sodium chloride, NaCl F) B) and E)
G) A) and B)

Question 6

Select the classification for the following reaction: Fe2+(aq)  + 2OH¯(aq)   →\rightarrow→ Fe(OH) 2(s)

Accepted Answer

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

Question 7

Select the correct set of products for the following reaction. Ba(OH) 2(aq)  + HNO3(aq)   →\rightarrow→

Accepted Answer

A)   BaN2(s)  + H2O(l) 
B)   Ba(NO3) 2(aq)  + H2O(l) 
C)   Ba(s)  + H2(g)  + NO2(g) 
D)   Ba2O(s)  + NO2(g)  + H2O(l) 
E)   No reaction occurs. F) A) and E)
G) B) and E)

Question 8

Which of the following is a strong base?

Accepted Answer

A)   NH3
B)   Ca(OH) 2
C)   Al(OH) 3
D)   B(OH) 3
E)   CH3OHF) A) and B)
G) A) and E)

Question 9

How many moles of ions are released when 0.27 mol of cobalt(II)  chloride, CoCl2, is dissolved in water?

Accepted Answer

A)   0.81 mol
B)   0.54 mol
C)   0.27 mol
D)   0.18 mol
E)   0.090 molF) A) and E)
G) D) and E)

Question 10

Chemical reactions generally reach equilibrium because one of the reactants is used up.

Accepted Answer

A) True 
 B)False

Question 11

Consider the reaction: 3Co2+(aq)  + 6NO3¯(aq)  + 6Na+(aq)  + 2PO43¯(aq)   →\rightarrow→ 
Co3(PO4) 2(s)  + 6Na+(aq)  + 6NO3¯(aq) 
Identify the net ionic equation for this reaction.

Accepted Answer

A)   Na+(aq)  + NO3¯(aq)   →\rightarrow→ NaNO3(aq) 
B)   3Co2+(aq)  + NO3¯(aq)  + Na+(aq)  + 2PO43¯(aq)   →\rightarrow→ Co3(PO4) 2(s)  + NaNO3(aq) 
C)   3Co2+(aq)  + 6NO3¯(aq)  + 6Na+(aq)  + 2PO43¯(aq)   →\rightarrow→ Co3(PO4) 2(s)  + 6NaNO3(aq) 
D)   3Co2+(aq)  + 2PO43¯(aq)   →\rightarrow→ Co3(PO4) 2(s) 
E)   None of these choices is correct. F) A) and D)
G) A) and E)

Question 12

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

Question 13

Which of the following is most soluble in water?

Accepted Answer

A)   benzene, C6H6
B)   potassium nitrate, KNO3
C)   carbon tetrachloride, CCl4
D)   hexane, C6H14
E)   ethane, C2H4F) B) and C)
G) B) and D)

Question 14

In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Accepted Answer

A) True 
 B)False

Question 15

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 16

Predict the product(s)  for the following reaction: 2SO4(aq)  + H2O(l)  B)  K2S(aq)  + H2O(l)  C)  K(s)  + H2(g)  + SO3(g)  D)  KSO4(aq)  + H2O(l)  E)  No reaction occurs." class="answers-bank-image d-inline" rel="preload" >

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

Question 17

Select the classification for the following reaction.

Accepted Answer

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

Question 18

Which of the following will be least soluble in water?

Accepted Answer

A)   potassium sulfate, K2SO4
B)   ammonium nitrate, NH4NO3
C)   chloromethane, CH3Cl
D)   calcium chloride, CaCl2
E)   ethanol, C2H6OF) All of the above
G) A) and C)

Question 19

Which one of the following ionic compounds is insoluble in water?

Accepted Answer

A)   Na3PO4
B)   AgNO3
C)   NaCl
D)   CaCO3
E)   MgCl2F) All of the above
G) None of the above

Question 20

Select the classification for the following reaction: NH3(aq)  + HNO3(aq)   →\rightarrow→ NH4NO3(aq)

Accepted Answer

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

Exam 4: Three Major Classes of Chemical Reactions

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4) 3PO4, is dissolved in water?

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Which of the following will be least soluble in water?

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Which one of the following ionic compounds is insoluble in water?

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Which of the following is most soluble in water?

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In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

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What is the oxidation number of iodine in I2.

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Select the classification for the following reaction: NH3(aq) + HNO3(aq) →\rightarrow→ NH4NO3(aq)

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Which of the following is a strong base?

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Select the correct set of products for the following reaction. Ba(OH) 2(aq) + HNO3(aq) →\rightarrow→

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Which one of the following substances is a strong acid?

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Predict the product(s) for the following reaction:

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Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.

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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?

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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) →\rightarrow→

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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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The combustion of an element is always a combination reaction.

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Select the classification for the following reaction.

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Chemical reactions generally reach equilibrium because one of the reactants is used up.

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Select the classification for the following reaction: Fe2+(aq) + 2OH¯(aq) →\rightarrow→ Fe(OH) 2(s)

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Consider the reaction: 3Co2+(aq) + 6NO3¯(aq) + 6Na+(aq) + 2PO43¯(aq) →\rightarrow→ Co3(PO4) 2(s) + 6Na+(aq) + 6NO3¯(aq) Identify the net ionic equation for this reaction.

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How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄) ₃PO₄, is dissolved in water?

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What is the oxidation number of iodine in I₂.

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Select the classification for the following reaction: NH₃(aq) + HNO₃(aq) $\rightarrow$ NH₄NO₃(aq)

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Select the correct set of products for the following reaction. Ba(OH) ₂(aq) + HNO₃(aq) $\rightarrow$

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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) $\rightarrow$

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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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Select the classification for the following reaction: Fe²⁺(aq) + 2OH^¯(aq) $\rightarrow$ Fe(OH) ₂(s)

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Consider the reaction: 3Co²⁺(aq) + 6NO₃^¯(aq) + 6Na⁺(aq) + 2PO₄^3¯(aq) $\rightarrow$ Co₃(PO₄) ₂(s) + 6Na⁺(aq) + 6NO₃^¯(aq) Identify the net ionic equation for this reaction.

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