Question 1

Which of the following is considered a STRONG electrolyte?

Accepted Answer

A)  NH4NO3 
B)  C12H22O11 
C)  PbCl2 
D)  HC2H3O2 
E)  CH3OH 
A)  NH4NO3 
B)  C12H22O11 
C)  PbCl2 
D)  HC2H3O2 
E)  CH3OH A

Question 2

How many of the following compounds are soluble in water? Pb(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 D

Question 3

Identify the polyprotic acid.

Accepted Answer

A)  H2SO4 
B)  HCl 
C)  LiI 
D)  NaOH 
E)  Ba(OH)2 
A)  H2SO4 
B)  HCl 
C)  LiI 
D)  NaOH 
E)  Ba(OH)2 A

Question 4

What reagent could NOT be used to separate OH- from Cl- when added to an aqueous solution containing both?

Accepted Answer

A)  AgNO3(aq) 
B)  Ca(NO3)2(aq) 
C)  Cu(NO3)2(aq) 
D)  Fe(NO3)2(aq) 
A)  AgNO3(aq) 
B)  Ca(NO3)2(aq) 
C)  Cu(NO3)2(aq) 
D)  Fe(NO3)2(aq)

Question 5

What is the oxidation number of the oxygen atom in O22-?

Accepted Answer

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

Question 6

A solution is prepared by mixing 5.00 mL of 0.100 M HCl and 2.00 mL of 0.200 M NaCl.What is the molarity of chloride ion in this solution?

Accepted Answer

A)  0.171 
B)  7.78 
C)  0.450 
D)  0.0143 
E)  0.129 
A)  0.171 
B)  7.78 
C)  0.450 
D)  0.0143 
E)  0.129

Question 7

Determine the oxidation state of carbon in CO2.

Accepted Answer

A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  +4 
A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  +4

Question 8

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+   (g)→ 2 Li3N(s)
How many moles of lithium nitride are produced when 0.750 mol of lithium react in this fashion?

Accepted Answer

A)  0.250 
B)  1.50 
C)  0.125 
D)  2.25 
E)  0.375 
A)  0.250 
B)  1.50 
C)  0.125 
D)  2.25 
E)  0.375

Question 9

Identify the oxidation state of Ca in CaF2(aq). Ca(s)+ 2 HF(aq)→ CaF2(aq)+ H2(g)

Accepted Answer

A)  +1 
B)  +2 
C)  0 
D)  -1 
E)  -2 
A)  +1 
B)  +2 
C)  0 
D)  -1 
E)  -2

Question 10

Identify barium hydroxide.

Accepted Answer

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

Question 11

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of MgSO3 and HI are mixed.

Accepted Answer

A)  2 H+(aq) + SO32-(aq) → H2O(l) + SO2(g) 
B)  Mg2+(aq) + 2 I-(aq) → MgI2(s) 
C)  2 H+(aq) + SO32-(aq) + Mg2+(aq) + 2 I-(aq) → H2SO3(s) + MgI2(aq) 
D)  2 H+(aq) + SO32-(aq) + Mg2+(aq) + 2 I-(aq) → H2O(l) + SO2(g) + Mg2+(aq) + 2 I-(aq) 
E)  No reaction occurs. 
A)  2 H+(aq) + SO32-(aq) → H2O(l) + SO2(g) 
B)  Mg2+(aq) + 2 I-(aq) → MgI2(s) 
C)  2 H+(aq) + SO32-(aq) + Mg2+(aq) + 2 I-(aq) → H2SO3(s) + MgI2(aq) 
D)  2 H+(aq) + SO32-(aq) + Mg2+(aq) + 2 I-(aq) → H2O(l) + SO2(g) + Mg2+(aq) + 2 I-(aq) 
E)  No reaction occurs.

Question 12

How many carbonate ions are present in 30.0 mL of 0.600 M Li2CO3 solution?

Accepted Answer

A)  3.25 × 1022 ions 
B)  2.17 × 1022 ions 
C)  1.08 × 1022 ions 
D)  5.42 × 1022 ions 
E)  3.61 × 1021 ions 
A)  3.25 × 1022 ions 
B)  2.17 × 1022 ions 
C)  1.08 × 1022 ions 
D)  5.42 × 1022 ions 
E)  3.61 × 1021 ions

Question 13

Determine the concentration of a solution prepared by diluting 20.0 mL of a 0.200 M LiCl to 250.0 mL.

Accepted Answer

A)  0.160 M 
B)  0.0320 M 
C)  2.50 M 
D)  0.00800 M 
E)  0.0160 M 
A)  0.160 M 
B)  0.0320 M 
C)  2.50 M 
D)  0.00800 M 
E)  0.0160 M

Question 14

Consider the following balanced reaction.How many grams of water are required to form 75.9 g of HNO3? Assume that there is excess NO2 present.The molar masses are as follows: H2O = 18.02 g/mol,HNO3 = 63.02 g/mol. 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

Accepted Answer

A)  38.0 g H2O 
B)  21.7 g H2O 
C)  43.4 g H2O 
D)  10.9 g H2O 
E)  26.5 g H2O 
A)  38.0 g H2O 
B)  21.7 g H2O 
C)  43.4 g H2O 
D)  10.9 g H2O 
E)  26.5 g H2O

Question 15

Identify the oxidizing agent. 2 Al3+(aq)+ 2 Fe(s)→ 2 Al(s)+ 3 Fe2+(aq)

Accepted Answer

A)  Al3+ 
B)  Fe 
C)  Al 
D)  Fe2+ 
E)  This is not an oxidation-reduction reaction. 
A)  Al3+ 
B)  Fe 
C)  Al 
D)  Fe2+ 
E)  This is not an oxidation-reduction reaction.

Question 16

If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 4.00 g of O2? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Accepted Answer

A)  6.63 g 
B)  10.2 g 
C)  15.7 g 
D)  35.3 g 
A)  6.63 g 
B)  10.2 g 
C)  15.7 g 
D)  35.3 g

Question 17

How many milliliters of a stock solution of 13.5 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3?

Accepted Answer

A)  0.0540 
B)  18.5 
C)  3.38 
D)  54.0 
E)  0.0185 
A)  0.0540 
B)  18.5 
C)  3.38 
D)  54.0 
E)  0.0185

Question 18

The density of ethanol,C2H5OH,is 0.789 g/mL.How many milliliters of ethanol are needed to produce 30.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(l)

Accepted Answer

A)  12.4 mL 
B)  19.9 mL 
C)  39.8 mL 
D)  79.6 mL 
A)  12.4 mL 
B)  19.9 mL 
C)  39.8 mL 
D)  79.6 mL

Question 19

Determine the oxidation state of nitrogen in NaNO2.

Accepted Answer

A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  -3 
A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  -3

Question 20

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+ N2(g)→ 2 Li3N(s)
In a particular experiment,1.50-g samples of each reagent are reacted.The theoretical yield of lithium nitride is ________ g.

Accepted Answer

A)  1.51 
B)  1.25 
C)  7.5 
D)  2.51 
E)  3.7 
A)  1.51 
B)  1.25 
C)  7.5 
D)  2.51 
E)  3.7

Exam 4: Chemical Quantities and Aqueous Reactions

Which of the following is considered a STRONG electrolyte?

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

Identify the polyprotic acid.

What reagent could NOT be used to separate OH- from Cl- when added to an aqueous solution containing both?

What is the oxidation number of the oxygen atom in O22-?

A solution is prepared by mixing 5.00 mL of 0.100 M HCl and 2.00 mL of 0.200 M NaCl.What is the molarity of chloride ion in this solution?

Determine the oxidation state of carbon in CO2.

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li3N(s) How many moles of lithium nitride are produced when 0.750 mol of lithium react in this fashion?

Identify the oxidation state of Ca in CaF2(aq). Ca(s)+ 2 HF(aq)→ CaF2(aq)+ H2(g)

Identify barium hydroxide.

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of MgSO3 and HI are mixed.

How many carbonate ions are present in 30.0 mL of 0.600 M Li2CO3 solution?

Determine the concentration of a solution prepared by diluting 20.0 mL of a 0.200 M LiCl to 250.0 mL.

Consider the following balanced reaction.How many grams of water are required to form 75.9 g of HNO3? Assume that there is excess NO2 present.The molar masses are as follows: H2O = 18.02 g/mol,HNO3 = 63.02 g/mol. 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

Identify the oxidizing agent. 2 Al3+(aq)+ 2 Fe(s)→ 2 Al(s)+ 3 Fe2+(aq)

If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 4.00 g of O2? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

How many milliliters of a stock solution of 13.5 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3?

The density of ethanol,C2H5OH,is 0.789 g/mL.How many milliliters of ethanol are needed to produce 30.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(l)

Determine the oxidation state of nitrogen in NaNO2.

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+ N2(g)→ 2 Li3N(s) In a particular experiment,1.50-g samples of each reagent are reacted.The theoretical yield of lithium nitride is ________ g.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

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,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

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

What reagent could NOT be used to separate OH^-fromCl^- when added to an aqueous solution containing both?

What is the oxidation number of the oxygen atom in O₂^2-?

Determine the oxidation state of carbon in CO₂.

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li₃N(s) How many moles of lithium nitride are produced when 0.750 mol of lithium react in this fashion?

Identify the oxidation state of Ca in CaF₂(aq). Ca(s)+ 2 HF(aq)→ CaF₂(aq)+ H₂(g)

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of MgSO₃ and HI are mixed.

How many carbonate ions are present in 30.0 mL of 0.600 M Li₂CO₃ solution?

Consider the following balanced reaction.How many grams of water are required to form 75.9 g of HNO₃? Assume that there is excess NO₂ present.The molar masses are as follows: H₂O = 18.02 g/mol,HNO₃ = 63.02 g/mol. 3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g)

Identify the oxidizing agent. 2 Al³⁺(aq)+ 2 Fe(s)→ 2 Al(s)+ 3 Fe²⁺(aq)

If the percent yield for the following reaction is 65.0%,how many grams of KClO₃ are needed to produce 4.00 g of O₂? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g)

How many milliliters of a stock solution of 13.5 M HNO₃ would be needed to prepare 0.500 L of 0.500 M HNO₃?

The density of ethanol,C₂H₅OH,is 0.789 g/mL.How many milliliters of ethanol are needed to produce 30.0 g of CO₂ according to the following chemical equation? C₂H₅OH(l)+ 3 O₂(g)→ 2 CO₂(g)+ 3 H₂O(l)

Determine the oxidation state of nitrogen in NaNO₂.

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+ N₂(g)→ 2 Li₃N(s) In a particular experiment,1.50-g samples of each reagent are reacted.The theoretical yield of lithium nitride is ________ g.