Question 1

Complete and balance the equation for the following acid-base reaction.

Accepted Answer

$ \mathrm{Ca}(\mathrm{OH})_{2}(a q)+2 \mathrm{HCl}(a q) \rightarrow \mathrm{CaCl}_{2}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) $

Question 2

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. 
A) 
B)

Accepted Answer

a. $ 2 \mathrm{AgNO}_{3}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow 2 \mathrm{AgCl}(s)+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(a q) $
b. $ 3 \mathrm{NaOH}(a q)+F e\left(\mathrm{NO}_{3}\right)_{3}(a q) \rightarrow \mathrm{Fe}(\mathrm{OH})_{3}(s)+3 \mathrm{NaNO}_{3}(a q) $

Question 3

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 $\rightarrow$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. E

Question 4

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO3¯. MnO4¯(aq) + HSO3¯(aq) + H+(aq) $\rightarrow$Mn2+(aq) + SO42¯(aq) + H2O(l)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  10 
A)  1 
B)  2 
C)  3 
D)  5 
E)  10

Question 5

A) Define "reduction."
B) Balance the following redox equation. $ \mathrm{HNO}_{3}(a q)+\mathrm{KI}(a q) \rightarrow \mathrm{NO}(g)+\mathrm{I}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(b)+\mathrm{KNO}_{3}(a q) $

Accepted Answer

a. Reduction: gain o

Question 6

How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Accepted Answer

A)  0.60 mol 
B)  0.75 mol 
C)  0.94 mol 
D)  1.7 mol 
E)  1.9 mol 
A)  0.60 mol 
B)  0.75 mol 
C)  0.94 mol 
D)  1.7 mol 
E)  1.9 mol

Question 7

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)  K2CO3 
B)  NaI 
C)  MgCl2 
D)  CH3OH 
E)  NH4Cl 
A)  K2CO3 
B)  NaI 
C)  MgCl2 
D)  CH3OH 
E)  NH4Cl

Question 8

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 9

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 10

Which one of the following is not a redox reaction?

Accepted Answer

A)  2H2O2(aq) $\rightarrow$ 2H2O(l) + O2(g) 
B)  N2(g) + 3H2(g) $\rightarrow$ 2NH3(g) 
C)  BaCl2(aq) + K2CrO4(aq) $\rightarrow$BaCrO4(aq) + 2KCl(aq) 
D)  2Al(s) + Fe2O3(s) $\rightarrow$Al2O3(s) + 2Fe(s) 
E)  2H2O(g) $\rightarrow$ 2H2(g) + O2(g) 
A)  2H2O2(aq) $\rightarrow$ 2H2O(l) + O2(g) 
B)  N2(g) + 3H2(g) $\rightarrow$ 2NH3(g) 
C)  BaCl2(aq) + K2CrO4(aq) $\rightarrow$BaCrO4(aq) + 2KCl(aq) 
D)  2Al(s) + Fe2O3(s) $\rightarrow$Al2O3(s) + 2Fe(s) 
E)  2H2O(g) $\rightarrow$ 2H2(g) + O2(g)

Question 11

Which one of the following is not a redox reaction?

Accepted Answer

A)  2Na(s) + 2H2O(l) $\rightarrow$ 2NaOH(aq) + H2(g) 
B)  H2(g) + Cl2(g) $\rightarrow$ 2HCl(g) 
C)  2H2O2(aq) $\rightarrow$2H2O(l) + O2(g) 
D)  Fe2O3(s) + 3H2SO4(aq) $\rightarrow$Fe2(SO4)3(aq) + 3H2O(l) 
E)  2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) $\rightarrow$K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l) 
A)  2Na(s) + 2H2O(l) $\rightarrow$ 2NaOH(aq) + H2(g) 
B)  H2(g) + Cl2(g) $\rightarrow$ 2HCl(g) 
C)  2H2O2(aq) $\rightarrow$2H2O(l) + O2(g) 
D)  Fe2O3(s) + 3H2SO4(aq) $\rightarrow$Fe2(SO4)3(aq) + 3H2O(l) 
E)  2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) $\rightarrow$K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l)

Question 12

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) $\rightarrow$ CaCl2(aq) + H2O(l)

Accepted Answer

A)  0.0200 M 
B)  0.0400 M 
C)  0.0800 M 
D)  4.00 *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 *10¯5 M 
E)  None of these choices is correct.

Question 13

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Accepted Answer

A)  0.184% 
B)  1.63% 
C)  3.26% 
D)  5.43% 
E)  9.23% 
A)  0.184% 
B)  1.63% 
C)  3.26% 
D)  5.43% 
E)  9.23%

Question 14

Select the classification for the following reaction: H2CO3(aq) $\rightarrow$ H2O(l) + CO2(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.

Question 15

Select the classification for the following reaction.

Accepted Answer

A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation 
A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation

Question 16

The oxidation numbers of P, S and Cl in H2PO2¯, H2S and KClO4 are, respectively

Accepted Answer

A)  -1, -1, +3 
B)  +1, -2, +7 
C)  +1, +2, +7 
D)  -1, -2, +7 
E)  -1, -2, +3 
A)  -1, -1, +3 
B)  +1, -2, +7 
C)  +1, +2, +7 
D)  -1, -2, +7 
E)  -1, -2, +3

Question 17

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

Accepted Answer

A)  +3 
B)  +5 
C)  +10 
D)  +15 
E)  None of these choices is correct. 
A)  +3 
B)  +5 
C)  +10 
D)  +15 
E)  None of these choices is correct.

Question 18

Select the classification for the following reaction. 2Na(s) + 2H2O(l) $\rightarrow$ 2NaOH(aq) + H2(g)

Accepted Answer

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

Question 19

Balance the redox 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

The answer of Balance the redox equation \( \mathrm{HNO}_{3}(a q)+\mathrm{C}_{2}...

Question 20

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO42¯. CrO42¯(aq) + CN¯(aq) + H2O(l) $\rightarrow$ CNO¯(aq) + Cr(OH)4¯(aq) + OH¯(aq)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  6 
A)  1 
B)  2 
C)  3 
D)  5 
E)  6

Exam 4: Three Major Classes of Chemical Reactions

Complete and balance the equation for the following acid-base reaction.

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. A) B)

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

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO3¯. MnO4¯(aq) + HSO3¯(aq) + H+(aq) →\rightarrow→ Mn2+(aq) + SO42¯(aq) + H2O(l)

How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Which of the following is a strong acid?

Which one of the following is not a redox reaction?

Which one of the following is not a redox reaction?

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) →\rightarrow→ CaCl2(aq) + H2O(l)

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Select the classification for the following reaction: H2CO3(aq) →\rightarrow→ H2O(l) + CO2(g)

Select the classification for the following reaction.

The oxidation numbers of P, S and Cl in H2PO2¯, H2S and KClO4 are, respectively

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

Select the classification for the following reaction. 2Na(s) + 2H2O(l) →\rightarrow→ 2NaOH(aq) + H2(g)

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO42¯. CrO42¯(aq) + CN¯(aq) + H2O(l) →\rightarrow→ CNO¯(aq) + Cr(OH)4¯(aq) + OH¯(aq)

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 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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO₃^¯. MnO₄^¯(aq) + HSO₃^¯(aq) + H⁺(aq) $\rightarrow$ Mn²⁺(aq) + SO₄^2¯(aq) + H₂O(l)

How many moles of H⁺(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Potassium carbonate, K₂CO₃, sodium iodide, NaI, magnesium chloride, MgCl₂, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Ammonia, NH₃, produces hydroxide ions in aqueous solution by

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) $\rightarrow$ CaCl₂(aq) + H₂O(l)

Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Select the classification for the following reaction: H₂CO₃(aq) $\rightarrow$ H₂O(l) + CO₂(g)

The oxidation numbers of P, S and Cl in H₂PO₂^¯, H₂S and KClO₄ are, respectively

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

Select the classification for the following reaction. 2Na(s) + 2H₂O(l) $\rightarrow$ 2NaOH(aq) + H₂(g)

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO₄^2¯. CrO₄^2¯(aq) + CN^¯(aq) + H₂O(l) $\rightarrow$ CNO^¯(aq) + Cr(OH)₄^¯(aq) + OH^¯(aq)