Question 1

Which of the following describes HCl?

Accepted Answer

A) strong electrolyte, weak acid 
B) weak electrolyte, weak acid 
C) strong electrolyte, strong acid 
D) weak electrolyte, strong acid 
E) nonelectrolyte 
A) strong electrolyte, weak acid 
B) weak electrolyte, weak acid 
C) strong electrolyte, strong acid 
D) weak electrolyte, strong acid 
E) nonelectrolyte

Question 2

Identify the balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapour.

Accepted Answer

A) 2C2H6(g)+ 7O2(g)→ 4CO2(g)+ 6H2O(g) 
B) C2H6(g)+ 5O(g)→ 2CO(g)+ 3H2O(g) 
C) 2C2H6(g)+ 5O2(g)→ 4CO(g)+ 6H2O(g) 
D) C2H6(g)+ 7O(g)→ 2CO2(g)+ 3H2O(g) 
E) 2CH3(g)+ 5O(g)→ 2CO(g)+ 3H2O(g) 
A) 2C2H6(g)+ 7O2(g)→ 4CO2(g)+ 6H2O(g) 
B) C2H6(g)+ 5O(g)→ 2CO(g)+ 3H2O(g) 
C) 2C2H6(g)+ 5O2(g)→ 4CO(g)+ 6H2O(g) 
D) C2H6(g)+ 7O(g)→ 2CO2(g)+ 3H2O(g) 
E) 2CH3(g)+ 5O(g)→ 2CO(g)+ 3H2O(g)

Question 3

How many of the following compounds are soluble in water? 
Cu(OH)2 LiNO3 NH4Br K2S

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 4

List the spectator ions in the following reaction:
Ba+2(aq)+ 2OH-(aq)+ 2 Na+(aq)+ CO3-2(aq)→ 2 Na+(aq)+ 2OH-(aq)+ BaCO3(s)

Accepted Answer

Question 5

How many litres of a 0.0550 mol L-1 KCl solution contain 0.163 moles of KCl?

Accepted Answer

A) 3.37 L 
B) 1.48 L 
C) 8.97 L 
D) 2.96 L 
E) 1.12 L 
A) 3.37 L 
B) 1.48 L 
C) 8.97 L 
D) 2.96 L 
E) 1.12 L

Question 6

What is the oxidation number of the oxygen atom in Na2O2 ?

Accepted Answer

A) -2 
B) -1 
C) +1 
D) +2 
A) -2 
B) -1 
C) +1 
D) +2

Question 7

Which of the compounds of H2C2O4, Ca(OH)2, KOH, and HI behave as acids when they are dissolved in water?

Accepted Answer

A) Ca(OH)2 and KOH 
B) H2C2O4 and HI 
C) only HI 
D) only KOH 
A) Ca(OH)2 and KOH 
B) H2C2O4 and HI 
C) only HI 
D) only KOH

Question 8

How many moles of CuO can be produced from 0.900 mol of Cu2O in the following reaction? 2Cu2O(s)+ O2(g)→ 4CuO(s)

Accepted Answer

A) 0.450 mol 
B) 0.900 mol 
C) 1.80 mol 
D) 3.60 mol 
A) 0.450 mol 
B) 0.900 mol 
C) 1.80 mol 
D) 3.60 mol

Question 9

Identify the spectator ions in the following molecular equation: KBr(aq)+ AgNO3(aq)→ AgBr(s)+ KNO3(aq)

Accepted Answer

A) Ag+ and Br- 
B) K+ and NO3- 
C) K+ and Br- 
D) Ag+ and NO3- 
E) There are no spectator ions in this reaction. 
A) Ag+ and Br- 
B) K+ and NO3- 
C) K+ and Br- 
D) Ag+ and NO3- 
E) There are no spectator ions in this reaction.

Question 10

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g Al(OH)3.

Accepted Answer

A) 0.658 L 
B) 1.52 L 
C) 1.88 L 
D) 1.01 L 
E) 0.531 L 
A) 0.658 L 
B) 1.52 L 
C) 1.88 L 
D) 1.01 L 
E) 0.531 L

Question 11

What volume (in mL)of a 0.0887 mol L-1 MgF2 solution is needed to make 275.0 mL of a 0.0224 mol L-1 MgF2 solution?

Accepted Answer

A) 72.3 mL 
B) 91.8 mL 
C) 10.9 mL 
D) 69.4 mL 
E) 14.4 mL 
A) 72.3 mL 
B) 91.8 mL 
C) 10.9 mL 
D) 69.4 mL 
E) 14.4 mL

Question 12

If the density of ethanol, C2H5OH, is 0.789 g mL-1. How many millilitres of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3O2(g)→ 2CO2(g)+ 3H2O(l)

Accepted Answer

A) 6.19 mL 
B) 9.95 mL 
C) 19.9 mL 
D) 39.8 mL 
A) 6.19 mL 
B) 9.95 mL 
C) 19.9 mL 
D) 39.8 mL

Question 13

Which of the following is a precipitation reaction?

Accepted Answer

A) Zn(s)+ 2AgNO3(aq)→ 2Ag(s)+ Zn(NO3)2(aq) 
B) NaCl(aq)+ LiI(aq)→ NaI(aq)+ LiCl(aq) 
C) 2LiI(aq)+ Hg2(NO3)2(aq)→ Hg2I2(s)+ 2LiNO3(aq) 
D) HCl(aq)+ KOH(aq)→ KCl(aq)+ H2O(l) 
E) None of the above are precipitation reactions. 
A) Zn(s)+ 2AgNO3(aq)→ 2Ag(s)+ Zn(NO3)2(aq) 
B) NaCl(aq)+ LiI(aq)→ NaI(aq)+ LiCl(aq) 
C) 2LiI(aq)+ Hg2(NO3)2(aq)→ Hg2I2(s)+ 2LiNO3(aq) 
D) HCl(aq)+ KOH(aq)→ KCl(aq)+ H2O(l) 
E) None of the above are precipitation reactions.

Question 14

How many chloride ions are present in 65.5 mL of 0.210 mol L-1 AlCl3 solution?

Accepted Answer

A) 4.02 × 1023 chloride ions 
B) 5.79 × 1024 chloride ions 
C) 2.48 × 1022 chloride ions 
D) 8.28 × 1021 chloride ions 
E) 1.21 × 1022 chloride ions 
A) 4.02 × 1023 chloride ions 
B) 5.79 × 1024 chloride ions 
C) 2.48 × 1022 chloride ions 
D) 8.28 × 1021 chloride ions 
E) 1.21 × 1022 chloride ions

Question 15

Which one of the following compounds is insoluble in water?

Accepted Answer

A) CaCl2 
B) NaNO3 
C) PbCl2 
D) K2CO3 
A) CaCl2 
B) NaNO3 
C) PbCl2 
D) K2CO3

Question 16

How would the concentration change if a 1.0 L flask of 1.0 mol L-1 NaCl were left uncapped on a laboratory bench for several days? Why?

Accepted Answer

The concentration would slowly

Question 17

Which of the following is a gas-evolution reaction?

Accepted Answer

A) 2C2H6(l)+ 7O2(g)→ 4CO2(g)+ 6H2O(g) 
B) 2H2(g)+ O2(g)→ 2H2O(g) 
C) LiCl(aq)+ NaNO3(aq)→ LiNO3(aq)+ NaCl(g) 
D) NH4Cl(aq)+ KOH(aq)→ KCl(aq)+ NH3(g)+ H2O(l) 
E) None of the above is a gas-evolution reaction. 
A) 2C2H6(l)+ 7O2(g)→ 4CO2(g)+ 6H2O(g) 
B) 2H2(g)+ O2(g)→ 2H2O(g) 
C) LiCl(aq)+ NaNO3(aq)→ LiNO3(aq)+ NaCl(g) 
D) NH4Cl(aq)+ KOH(aq)→ KCl(aq)+ NH3(g)+ H2O(l) 
E) None of the above is a gas-evolution reaction.

Question 18

When 7.00 × 1022 molecules of ammonia react with 6.00 × 1022 molecules of oxygen according to the chemical equation shown below, how many grams of nitrogen gas are produced? 4NH3(g)+ 3O2(g)→ 2N2(g)+ 6H2O(g)

Accepted Answer

A) 1.63 g 
B) 1.86 g 
C) 4.19 g 
D) 6.51 g 
A) 1.63 g 
B) 1.86 g 
C) 4.19 g 
D) 6.51 g

Question 19

Which of the following compounds is an Arrhenius base?

Accepted Answer

A) CH3CO2H 
B) CH3CH2NH2 
C) HNO2 
D) H2SO4 
A) CH3CO2H 
B) CH3CH2NH2 
C) HNO2 
D) H2SO4

Question 20

The mixing of which pair of reactants will result in a precipitation reaction?

Accepted Answer

A) CsI(aq)+ NaOH(aq) 
B) HCl(aq)+ Ca(OH)2(aq) 
C) K2SO4(aq)+ Hg2(NO3)2(aq) 
D) NaNO3(aq)+ NH4Cl(aq) 
A) CsI(aq)+ NaOH(aq) 
B) HCl(aq)+ Ca(OH)2(aq) 
C) K2SO4(aq)+ Hg2(NO3)2(aq) 
D) NaNO3(aq)+ NH4Cl(aq)

Exam 4: Chemical Reactions and Stoichiometry

Which of the following describes HCl?

Identify the balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapour.

How many of the following compounds are soluble in water? Cu(OH)2 LiNO3 NH4Br K2S

List the spectator ions in the following reaction: Ba+2(aq)+ 2OH-(aq)+ 2 Na+(aq)+ CO3-2(aq)→ 2 Na+(aq)+ 2OH-(aq)+ BaCO3(s)

How many litres of a 0.0550 mol L-1 KCl solution contain 0.163 moles of KCl?

What is the oxidation number of the oxygen atom in Na2O2 ?

Which of the compounds of H2C2O4, Ca(OH)2, KOH, and HI behave as acids when they are dissolved in water?

How many moles of CuO can be produced from 0.900 mol of Cu2O in the following reaction? 2Cu2O(s)+ O2(g)→ 4CuO(s)

Identify the spectator ions in the following molecular equation: KBr(aq)+ AgNO3(aq)→ AgBr(s)+ KNO3(aq)

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g Al(OH)3.

What volume (in mL)of a 0.0887 mol L-1 MgF2 solution is needed to make 275.0 mL of a 0.0224 mol L-1 MgF2 solution?

If the density of ethanol, C2H5OH, is 0.789 g mL-1. How many millilitres of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3O2(g)→ 2CO2(g)+ 3H2O(l)

Which of the following is a precipitation reaction?

How many chloride ions are present in 65.5 mL of 0.210 mol L-1 AlCl3 solution?

Which one of the following compounds is insoluble in water?

How would the concentration change if a 1.0 L flask of 1.0 mol L-1 NaCl were left uncapped on a laboratory bench for several days? Why?

Which of the following is a gas-evolution reaction?

When 7.00 × 1022 molecules of ammonia react with 6.00 × 1022 molecules of oxygen according to the chemical equation shown below, how many grams of nitrogen gas are produced? 4NH3(g)+ 3O2(g)→ 2N2(g)+ 6H2O(g)

Which of the following compounds is an Arrhenius base?

The mixing of which pair of reactants will result in a precipitation reaction?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

How many of the following compounds are soluble in water? Cu(OH)₂ LiNO₃ NH₄Br K₂S

List the spectator ions in the following reaction: Ba⁺²(aq)+ 2OH^-(aq)+ 2 Na⁺(aq)+ CO₃^-2(aq)→ 2 Na⁺(aq)+ 2OH^-(aq)+ BaCO₃(s)

How many litres of a 0.0550 mol L^-1 KCl solution contain 0.163 moles of KCl?

What is the oxidation number of the oxygen atom in Na₂O₂?

Which of the compounds of H₂C₂O_4, Ca(OH)₂, KOH, and HI behave as acids when they are dissolved in water?

How many moles of CuO can be produced from 0.900 mol of Cu₂O in the following reaction? 2Cu₂O(s)+ O₂(g)→ 4CuO(s)

Identify the spectator ions in the following molecular equation: KBr(aq)+ AgNO₃(aq)→ AgBr(s)+ KNO₃(aq)

Find the volume of 0.110 mol L^-1 hydrochloric acid necessary to react completely with 1.52 g Al(OH)₃.

What volume (in mL)of a 0.0887 mol L^-1 MgF₂ solution is needed to make 275.0 mL of a 0.0224 mol L^-1 MgF₂solution?

If the density of ethanol, C₂H₅OH, is 0.789 g mL^-1. How many millilitres of ethanol are needed to produce 15.0 g of CO₂ according to the following chemical equation? C₂H₅OH(l)+ 3O₂(g)→ 2CO₂(g)+ 3H₂O(l)

How many chloride ions are present in 65.5 mL of 0.210 mol L^-1 AlCl₃ solution?

How would the concentration change if a 1.0 L flask of 1.0 mol L^-1 NaCl were left uncapped on a laboratory bench for several days? Why?

When 7.00 × 10²² molecules of ammonia react with 6.00 × 10²² molecules of oxygen according to the chemical equation shown below, how many grams of nitrogen gas are produced? 4NH₃(g)+ 3O₂(g)→ 2N₂(g)+ 6H₂O(g)