Question 1

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

Accepted Answer

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

Question 2

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) CuSO4 
A) CuS 
B) Cu2S 
C) NH4NO3 
D) NH4(NO3)2 
E) CuSO4 A

Question 3

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

Accepted Answer

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

Question 4

Write down the oxidation number of the indicated atom in each of the following formulas:
a.Si in SiO2
b.Cl in ClO2-
 c.Mn in KMnO4
 d.C in C6H12O6

Accepted Answer

Question 5

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 6

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) CH3OH 
A) NH3 
B) Ca(OH)2 
C) Al(OH)3 
D) B(OH)3 
E) CH3OH

Question 7

How many sodium ions are present in 325 mL of 0.850 M Na2SO4?

Accepted Answer

A) 1.66 $\times$ 1023 Na ions 
B) 3.33 $\times$ 1023 Na ions 
C) 4.99 $\times$ 1023 Na ions 
D) 6.20 $\times$ 1023 Na ions 
E) 1.57 $\times$ 1024 Na ions 
A) 1.66 $\times$ 1023 Na ions 
B) 3.33 $\times$ 1023 Na ions 
C) 4.99 $\times$ 1023 Na ions 
D) 6.20 $\times$ 1023 Na ions 
E) 1.57 $\times$ 1024 Na ions

Question 8

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 M 
A) 0.0524 M 
B) 0.888 M 
C) 1.13 M 
D) 2.26 M 
E) 2.43 M

Question 9

All combustion reactions are classified as combination reactions.

Accepted Answer

A) True 
 B)False

Question 10

Sulfuric acid (H2SO4)reacts with potassium hydroxide (KOH)as follows.
H2SO4(aq)+ 2KOH(aq) $\to$K2SO4(aq)+ 2H2O(l)
Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH.Show all your work.

Accepted Answer

The answer of Sulfuric acid (H2SO4)reacts with potassium hydroxide (KOH)as...

Question 11

Which one of the following substances is the best electrolyte?

Accepted Answer

A) CO 
B) CH3Cl 
C) CH4 
D) C2H5OH 
E) HCl 
A) CO 
B) CH3Cl 
C) CH4 
D) C2H5OH 
E) HCl

Question 12

Sodium thiosulfate,Na2S2O3,is used as a "fixer" in black and white photography.Identify the reducing agent in the reaction of thiosulfate with iodine.
2S2O32-(aq)+ I2(aq) $\to$ S4O62-(aq)+ 2I-(aq)

Accepted Answer

A) I2(aq) 
B) I-(aq) 
C) S2O32-(aq) 
D) S4O62-(aq) 
E) S2O32-(aq)and I-(aq) 
A) I2(aq) 
B) I-(aq) 
C) S2O32-(aq) 
D) S4O62-(aq) 
E) S2O32-(aq)and I-(aq)

Question 13

Which of the following is a strong acid?

Accepted Answer

A) H3PO4 
B) HNO3 
C) HF 
D) CH3COOH 
E) H2O 
A) H3PO4 
B) HNO3 
C) HF 
D) CH3COOH 
E) H2O

Question 14

A 0.00100 mol sample of Ca(OH)2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below.What is the concentration of the HCl?
Equation: Ca(OH)2(s)+ 2HCl(aq) $\to$ CaCl2(aq)+ H2O(l)

Accepted Answer

A) 0.0200 M 
B) 0.0400 M 
C) 0.0800 M 
D) 4.00 $\times$ 10-5 M 
E) None of these choices is correct. 
A) 0.0200 M 
B) 0.0400 M 
C) 0.0800 M 
D) 4.00 $\times$ 10-5 M 
E) None of these choices is correct.

Question 15

A combination reaction may also be a displacement reaction.

Accepted Answer

A) True 
 B)False

Question 16

Identify all the spectator ions in the following reaction.
2KMnO4(aq)+ 10FeSO4(aq)+ 8H2SO4(aq) $\to$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+ 
A) only K+ 
B) only SO42- 
C) only K+ and SO42- 
D) only K+,SO42- and Fe2+ 
E) only K+,SO42-,Fe2+ and Mn2+

Question 17

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

Accepted Answer

A) Na+(aq)+ NO3-(aq) $\to$ NaNO3(aq) 
B) Hg22+(aq)+ 2Cl-(aq) $\to$ Hg2Cl2(s) 
C) NaCl(aq) $\to$Na+(aq)+ Cl-(aq) 
D) Hg2(NO3)2(aq) $\to$ Hg22+(aq)+ 2NO3-(aq) 
E) Hg22+(aq) $\to$ Hg2(s) 
A) Na+(aq)+ NO3-(aq) $\to$ NaNO3(aq) 
B) Hg22+(aq)+ 2Cl-(aq) $\to$ Hg2Cl2(s) 
C) NaCl(aq) $\to$Na+(aq)+ Cl-(aq) 
D) Hg2(NO3)2(aq) $\to$ Hg22+(aq)+ 2NO3-(aq) 
E) Hg22+(aq) $\to$ Hg2(s)

Question 18

Complete and balance the equation for the following acid-base reaction.
Ca(OH)2(aq)+ HCl(aq) $\to$

Accepted Answer

Ca(OH)₂(a

Question 19

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

Accepted Answer

A) Ba2CO3 
B) BaCO3 
C) NaCl 
D) NaCl2 
E) BaO 
A) Ba2CO3 
B) BaCO3 
C) NaCl 
D) NaCl2 
E) BaO

Question 20

Which of the following solutions will be the best conductor of electrical current?

Accepted Answer

A) methyl alcohol,CH3OH(aq) 
B) glucose,C6H12O6(aq) 
C) potassium chloride,KCl(aq) 
D) bromine,Br2(aq) 
E) ethylene glycol,C2H6O2(aq) 
A) methyl alcohol,CH3OH(aq) 
B) glucose,C6H12O6(aq) 
C) potassium chloride,KCl(aq) 
D) bromine,Br2(aq) 
E) ethylene glycol,C2H6O2(aq)

Exam 4: Three Major Classes of Chemical Reactions

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

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

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

Write down the oxidation number of the indicated atom in each of the following formulas: a.Si in SiO2 b.Cl in ClO2- c.Mn in KMnO4 d.C in C6H12O6

The combustion of an element is always a combination reaction.

Which of the following is a strong base?

How many sodium ions are present in 325 mL of 0.850 M Na2SO4?

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?

All combustion reactions are classified as combination reactions.

Sulfuric acid (H2SO4)reacts with potassium hydroxide (KOH)as follows. H2SO4(aq)+ 2KOH(aq) →\to→ K2SO4(aq)+ 2H2O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH.Show all your work.

Which one of the following substances is the best electrolyte?

Sodium thiosulfate,Na2S2O3,is used as a "fixer" in black and white photography.Identify the reducing agent in the reaction of thiosulfate with iodine. 2S2O32-(aq)+ I2(aq) →\to→ S4O62-(aq)+ 2I-(aq)

Which of the following is a strong acid?

A 0.00100 mol sample of Ca(OH)2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below.What is the concentration of the HCl? Equation: Ca(OH)2(s)+ 2HCl(aq) →\to→ CaCl2(aq)+ H2O(l)

A combination reaction may also be a displacement reaction.

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

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

Complete and balance the equation for the following acid-base reaction. Ca(OH)2(aq)+ HCl(aq) →\to→

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

Which of the following solutions will be the best conductor of electrical current?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids,solids,and Phase Changes

The Properties of Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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

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

Write down the oxidation number of the indicated atom in each of the following formulas: a.Si in SiO₂ b.Cl in ClO₂^- c.Mn in KMnO₄ d.C in C₆H₁₂O₆

How many sodium ions are present in 325 mL of 0.850 M Na₂SO₄?

Sulfuric acid (H₂SO₄)reacts with potassium hydroxide (KOH)as follows. H₂SO₄(aq)+ 2KOH(aq) $\to$ K₂SO₄(aq)+ 2H₂O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH.Show all your work.

Sodium thiosulfate,Na₂S₂O₃,is used as a "fixer" in black and white photography.Identify the reducing agent in the reaction of thiosulfate with iodine. 2S₂O₃^2-(aq)+ I₂(aq) $\to$ S₄O₆^2-(aq)+ 2I^-(aq)

A 0.00100 mol sample of Ca(OH)₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below.What is the concentration of the HCl? Equation: Ca(OH)₂(s)+ 2HCl(aq) $\to$ CaCl₂(aq)+ H₂O(l)

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

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

Complete and balance the equation for the following acid-base reaction. Ca(OH)₂(aq)+ HCl(aq) $\to$

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