Question 1

Select the classification for the following reaction.

Accepted Answer

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

Question 2

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

Question 3

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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 E)
G) B) and E)

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

Question 7

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

Question 8

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

Question 9

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 C)
G) B) and D)

Question 10

Which one of the following substances is a strong acid?

Accepted Answer

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

Question 11

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

Question 12

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) A) and D)

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 C)
G) All of the above

Question 15

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

Question 16

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

Accepted Answer

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

Question 17

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

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

Question 19

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

Question 20

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Exam 4: Three Major Classes of Chemical Reactions

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

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Select the classification for the following reaction.

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

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Which of the following will be least soluble in water?

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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 H+(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

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

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Predict the product(s) for the following reaction:

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The combustion of an element is always a combination reaction.

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

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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 of the following is most soluble in water?

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

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Which one of the following substances is a strong acid?

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

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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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How many moles of H⁺(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

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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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What is the oxidation number of iodine in I₂.

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

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

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