Question 1

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 2

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, C2H4 
A)  benzene, C6H6 
B)  potassium nitrate, KNO3 
C)  carbon tetrachloride, CCl4 
D)  hexane, C6H14 
E)  ethane, C2H4

Question 3

Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, 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)  KBr 
D)  CH3OH 
E)  NH4Cl 
A)  K2CO3 
B)  NaI 
C)  KBr 
D)  CH3OH 
E)  NH4Cl

Question 4

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Accepted Answer

A)  2.543 mol 
B)  1.383 mol 
C)  0.7232 mol 
D)  0.3932 mol 
E)  0.001383 mol 
A)  2.543 mol 
B)  1.383 mol 
C)  0.7232 mol 
D)  0.3932 mol 
E)  0.001383 mol

Question 5

Which one of the following is not a redox reaction?

Accepted Answer

A)  2H2(g) + O2(g) → 2H2O(l) 
B)  Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) 
C)  H2O(l) + NH3(g) → NH4+(aq) + OH-(aq) 
D)  6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l) 
E)  Cl2(g) + 2KBr(aq) → Br2(l) + 2KCl(aq) 
A)  2H2(g) + O2(g) → 2H2O(l) 
B)  Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) 
C)  H2O(l) + NH3(g) → NH4+(aq) + OH-(aq) 
D)  6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l) 
E)  Cl2(g) + 2KBr(aq) → Br2(l) + 2KCl(aq)

Question 6

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles,   = 139.04 g/mol).

Accepted Answer

A)  8.625 M 
B)  1.199 M 
C)  0.8339 M 
D)  0.2031 M 
E)  0.008625 M 
A)  8.625 M 
B)  1.199 M 
C)  0.8339 M 
D)  0.2031 M 
E)  0.008625 M

Question 7

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 8

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

Accepted Answer

A)  28.5 mol 
B)  1.04 mol 
C)  0.139 mol 
D)  0.0285 mol 
E)  0.00721 mol 
A)  28.5 mol 
B)  1.04 mol 
C)  0.139 mol 
D)  0.0285 mol 
E)  0.00721 mol

Question 9

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4)3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)  KCI 
B)  Na2SO4 
C)  C6H12O6 
D)  CO2 
E)  (NH4)3PO4 
A)  KCI 
B)  Na2SO4 
C)  C6H12O6 
D)  CO2 
E)  (NH4)3PO4

Question 10

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

Question 11

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Accepted Answer

A)  CaCl2 
B)  HNO3 
C)  NH3 
D)  C6H12O6 (glucose) 
E)  CO2 
A)  CaCl2 
B)  HNO3 
C)  NH3 
D)  C6H12O6 (glucose) 
E)  CO2

Question 12

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Accepted Answer

A)  Mn in MnO2 is oxidized. 
B)  O in KClO3 is the oxidizing agent. 
C)  K in KClO3 is the reducing agent. 
D)  H in KOH is oxidized. 
E)  Cl in KClO3 is the reducing agent. 
A)  Mn in MnO2 is oxidized. 
B)  O in KClO3 is the oxidizing agent. 
C)  K in KClO3 is the reducing agent. 
D)  H in KOH is oxidized. 
E)  Cl in KClO3 is the reducing agent.

Question 13

Select the classification for the following reaction. 2NaCl(l)   2Na(l) + Cl2(g)

Accepted Answer

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

Question 14

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 15

During a titration, the following data were collected. A 25 mL portion of an unknown acid solution was titrated with 1.0 M NaOH. It required 65 mL of the base to neutralize the sample. How many moles of acid are present in 3.0 liters of this unknown solution?

Accepted Answer

A)  2.6 moles 
B)  0.9 moles 
C)  8.7 moles 
D)  7.8 moles 
E)  5.6 moles 
A)  2.6 moles 
B)  0.9 moles 
C)  8.7 moles 
D)  7.8 moles 
E)  5.6 moles

Question 16

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

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. 
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.

Question 17

How many mL of concentrated nitric acid (HNO3, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

Accepted Answer

A)  32.0 mL 
B)  62.5 mL 
C)  125 mL 
D)  250. mL 
E)  500. mL 
A)  32.0 mL 
B)  62.5 mL 
C)  125 mL 
D)  250. mL 
E)  500. mL

Question 18

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

Accepted Answer

A)  1.66 × 1023 sodium ions 
B)  3.33 × 1023 sodium ions 
C)  4.99 × 1023 sodium ions 
D)  6.20 × 1023 sodium ions 
E)  1.57 × 1024 sodium ions 
A)  1.66 × 1023 sodium ions 
B)  3.33 × 1023 sodium ions 
C)  4.99 × 1023 sodium ions 
D)  6.20 × 1023 sodium ions 
E)  1.57 × 1024 sodium ions

Question 19

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq) → 2H2O(l) + Na2SO4(aq)

Accepted Answer

A)  0.045 L 
B)  0.28 L 
C)  0.56 L 
D)  0.90 L 
E)  1.1 L 
A)  0.045 L 
B)  0.28 L 
C)  0.56 L 
D)  0.90 L 
E)  1.1 L

Question 20

Which one of the following is not a redox reaction?

Accepted Answer

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

Exam 4: Three Major Classes of Chemical Reactions

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

Which of the following is most soluble in water?

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

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Which one of the following is not a redox reaction?

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles, = 139.04 g/mol).

Which one of the following substances is the best electrolyte?

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4)3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

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

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl2(g)

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?

During a titration, the following data were collected. A 25 mL portion of an unknown acid solution was titrated with 1.0 M NaOH. It required 65 mL of the base to neutralize the sample. How many moles of acid are present in 3.0 liters of this unknown solution?

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

How many mL of concentrated nitric acid (HNO3, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

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

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq) → 2H2O(l) + Na2SO4(aq)

Which one of the following is not a redox reaction?

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

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

Potassium chloride, KCl, sodium sulfate, Na₂SO₄, glucose, C₆H₁₂O₆, carbon dioxide, CO₂ and ammonium phosphate, (NH₄)₃PO₄, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

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

Select the best statement relating to the following reaction: 2MnO₂(s) + KClO₃(aq) + 2KOH(aq) → 2KMnO₄(aq) + KCl(aq) + H₂O(l)

Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl₂(g)

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

How many mL of concentrated nitric acid (HNO₃, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

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

Automobile batteries use 3.0 M H₂SO₄ as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H₂SO₄(aq) + 2NaOH(aq) → 2H₂O(l) + Na₂SO₄(aq)