Question 1

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Accepted Answer

A)  donating a proton to an acid molecule. 
B)  donating a proton to a water molecule. 
C)  donating a hydrogen ion to a water molecule. 
D)  accepting an electron from an acid molecule. 
E)  accepting a proton from a water molecule. 
A)  donating a proton to an acid molecule. 
B)  donating a proton to a water molecule. 
C)  donating a hydrogen ion to a water molecule. 
D)  accepting an electron from an acid molecule. 
E)  accepting a proton from a water molecule.

Question 2

Select the classification for the following reaction. 2I-(aq) + Cl2(aq) → I2(aq) + 2Cl-(aq)

Accepted Answer

A)  Combination 
B)  Displacement 
C)  Decomposition 
D)  Precipitation 
E)  Acid-base 
A)  Combination 
B)  Displacement 
C)  Decomposition 
D)  Precipitation 
E)  Acid-base

Question 3

Predict the product(s) for the following reaction. H2SO4(aq) + KOH(aq) →

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. 
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.

Question 4

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 (   = 106.45 g/mol).

Accepted Answer

A)  419 g 
B)  169 g 
C)  0.419 g 
D)  0.169 g 
E)  0.00394 g 
A)  419 g 
B)  169 g 
C)  0.419 g 
D)  0.169 g 
E)  0.00394 g

Question 5

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 mol 
A)  1.2 mol 
B)  0.98 mol 
C)  0.87 mol 
D)  0.65 mol 
E)  0.49 mol

Question 6

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 (   = 84.02 g/mol)? HCl(aq) + NaHCO3(s) → NaCl(s) + H2O(l) + CO2(g)

Accepted Answer

A)  638 mL 
B)  572 mL 
C)  536 mL 
D)  276 mL 
E)  175 mL 
A)  638 mL 
B)  572 mL 
C)  536 mL 
D)  276 mL 
E)  175 mL

Question 7

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

Accepted Answer

A)  LiOH(aq) → Li+(aq) + OH-(aq) 
B)  HBr(aq) → H+(aq) + Br-(aq) 
C)  H+(aq) + OH-(aq) → H2O(l) 
D)  Li+(aq) + Br-(aq) → LiBr(aq) 
E)  Li+(aq) + OH-(aq) + H+(aq) + Br-(aq) → H2O(l) + LiBr(aq) 
A)  LiOH(aq) → Li+(aq) + OH-(aq) 
B)  HBr(aq) → H+(aq) + Br-(aq) 
C)  H+(aq) + OH-(aq) → H2O(l) 
D)  Li+(aq) + Br-(aq) → LiBr(aq) 
E)  Li+(aq) + OH-(aq) + H+(aq) + Br-(aq) → H2O(l) + LiBr(aq)

Question 8

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4)3PO4(aq) →

Accepted Answer

A)  cobalt(II) phosphate, Co3(PO4)2 
B)  cobalt(III) phosphate, Co3(PO4)2 
C)  cobalt(II) phosphate, CoPO4 
D)  cobalt(III) phosphate, CoPO4 
E)  ammonium sulfate, (NH4)2SO4 
A)  cobalt(II) phosphate, Co3(PO4)2 
B)  cobalt(III) phosphate, Co3(PO4)2 
C)  cobalt(II) phosphate, CoPO4 
D)  cobalt(III) phosphate, CoPO4 
E)  ammonium sulfate, (NH4)2SO4

Question 9

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Accepted Answer

A) True 
 B)False

Question 10

An acid

Accepted Answer

A)  produces hydroxide ions when dissolved in water. 
B)  changes the color of phenolphthalein indicator from colorless to pink. 
C)  donates electrons in an electron transfer reaction. 
D)  donates protons in a proton transfer reaction. 
E)  None of these choices are correct. 
A)  produces hydroxide ions when dissolved in water. 
B)  changes the color of phenolphthalein indicator from colorless to pink. 
C)  donates electrons in an electron transfer reaction. 
D)  donates protons in a proton transfer reaction. 
E)  None of these choices are correct.

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

All combustion reactions are classified as combination reactions.

Accepted Answer

A) True 
 B)False

Question 13

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)

Question 14

Predict the product(s) for the following reaction. BaO(s) + CO2(g) →

Accepted Answer

A)  Ba(s) + CO3(g) 
B)  BaCO3(s) 
C)  BaO(s) + C(s) 
D)  Ba(s) + CO32-(s) 
E)  No reaction occurs. 
A)  Ba(s) + CO3(g) 
B)  BaCO3(s) 
C)  BaO(s) + C(s) 
D)  Ba(s) + CO32-(s) 
E)  No reaction occurs.

Question 15

Oxidation is associated with an increase in oxidation number.

Accepted Answer

A) True 
 B)False

Question 16

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 → 6CO2 + 6H2O

Accepted Answer

A)  Hydrogen in C6H12O6 is being reduced. 
B)  Oxygen in O2 is being oxidized. 
C)  Hydrogen in C6H12O6 is the reducing agent. 
D)  Oxygen in C6H12O6 is the oxidizing agent. 
E)  Carbon in C6H12O6 is being oxidized. 
A)  Hydrogen in C6H12O6 is being reduced. 
B)  Oxygen in O2 is being oxidized. 
C)  Hydrogen in C6H12O6 is the reducing agent. 
D)  Oxygen in C6H12O6 is the oxidizing agent. 
E)  Carbon in C6H12O6 is being oxidized.

Question 17

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

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) 
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)

Question 19

Select the classification for the following reaction. Fe(s) + 2Fe3+(aq) → 3Fe2+(aq)

Accepted Answer

A)  Precipitation 
B)  Acid-base 
C)  Redox 
D)  Decomposition 
E)  None of these choices are correct. 
A)  Precipitation 
B)  Acid-base 
C)  Redox 
D)  Decomposition 
E)  None of these choices are correct.

Question 20

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)  HClO4 
A)  NaOH 
B)  CH3CH2OH (ethanol) 
C)  KBr 
D)  CH3COOH (acetic acid) 
E)  HClO4

Exam 4: Three Major Classes of Chemical Reactions

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Select the classification for the following reaction. 2I-(aq) + Cl2(aq) → I2(aq) + 2Cl-(aq)

Predict the product(s) for the following reaction. H2SO4(aq) + KOH(aq) →

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 ( = 106.45 g/mol).

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

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( = 84.02 g/mol)? HCl(aq) + NaHCO3(s) → NaCl(s) + H2O(l) + CO2(g)

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

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4)3PO4(aq) →

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

An acid

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

All combustion reactions are classified as combination reactions.

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

Predict the product(s) for the following reaction. BaO(s) + CO2(g) →

Oxidation is associated with an increase in oxidation number.

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 → 6CO2 + 6H2O

The combustion of an element is always a combination reaction.

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

Select the classification for the following reaction. Fe(s) + 2Fe3+(aq) → 3Fe2+(aq)

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

Keys to Studying Chemistry Definitions, Units, and Problem Solving

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 Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

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 Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Ammonia, NH₃, produces hydroxide ions in aqueous solution by

Select the classification for the following reaction. 2I_-(aq) + Cl₂(aq) → I₂(aq) + 2Cl_-(aq)

Predict the product(s) for the following reaction. H₂SO₄(aq) + KOH(aq) →

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃ ( = 106.45 g/mol).

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

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃ ( = 84.02 g/mol)? HCl(aq) + NaHCO₃(s) → NaCl(s) + H₂O(l) + CO₂(g)

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

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO₄(aq) + (NH₄)₃PO₄(aq) →

Predict the product(s) for the following reaction. BaO(s) + CO₂(g) →

Which of the statements below correctly describes the combustion of glucose, shown below? C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

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

Select the classification for the following reaction. Fe(s) + 2Fe₃₊(aq) → 3Fe₂₊(aq)