Question 1

Which of the following is a precipitation reaction?

Accepted Answer

A)  Zn(s) + 2 AgNO3(aq) → 2 Ag(s) + Zn(NO3)2(aq) 
B)  KCl(aq) + LiI(aq) → KI(aq) + LiCl(aq) 
C)  2 NaI(aq) + Hg2(NO3)2(aq) → Hg2I2(s) + 2 NaNO3(aq) 
D)  HCl(aq) + KOH(aq) → KCl(aq) + H2O(l) 
E)  None of the above is a precipitation reaction. 
A)  Zn(s) + 2 AgNO3(aq) → 2 Ag(s) + Zn(NO3)2(aq) 
B)  KCl(aq) + LiI(aq) → KI(aq) + LiCl(aq) 
C)  2 NaI(aq) + Hg2(NO3)2(aq) → Hg2I2(s) + 2 NaNO3(aq) 
D)  HCl(aq) + KOH(aq) → KCl(aq) + H2O(l) 
E)  None of the above is a precipitation reaction.

Question 2

Determine the oxidation state of iodine in I2.

Accepted Answer

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

Question 3

8.0 g of iron is reacted with 8.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s)+ 4 H2O(l)→ Fe3O4(s)+ 4 H2(g)

Accepted Answer

A)  11.1 g of Fe3O4 are produced. 
B)  4.56 g of H2O are left over. 
C)  Mass is conserved in this reaction. 
D)  Water is the limiting reactant. 
A)  11.1 g of Fe3O4 are produced. 
B)  4.56 g of H2O are left over. 
C)  Mass is conserved in this reaction. 
D)  Water is the limiting reactant.

Question 4

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 1.55 g of carbonic acid? H2CO3 → H2O + CO2

Accepted Answer

A)  1.10 g 
B)  2.18 g 
C)  1.55 g 
D)  0.450 g 
E)  5.33 g 
A)  1.10 g 
B)  2.18 g 
C)  1.55 g 
D)  0.450 g 
E)  5.33 g

Question 5

What is the molarity of a potassium triiodide solution,KI3(aq),if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.500 M thiosulfate solution,K2S2O3(aq)? The chemical equation for the reaction is 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq).

Accepted Answer

A)  0.208 M 
B)  0.300 M 
C)  0.417 M 
D)  0.833 M 
A)  0.208 M 
B)  0.300 M 
C)  0.417 M 
D)  0.833 M

Question 6

Identify NaI.

Accepted Answer

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

Question 7

Determine the molarity of a solution formed by dissolving 468 mg of MgI2 in enough water to yield 50.0 mL of solution.

Accepted Answer

A)  0.0297 M 
B)  0.0337 M 
C)  0.0936 M 
D)  0.0107 M 
E)  0.0651 M 
A)  0.0297 M 
B)  0.0337 M 
C)  0.0936 M 
D)  0.0107 M 
E)  0.0651 M

Question 8

Which of the following solutions will have the highest electrical conductivity?

Accepted Answer

A)  0.045 M Al2(SO4)3 
B)  0.040 M (NH4)2CO3 
C)  0.10 M LiBr 
D)  0.15 M NaI 
E)  0.15 M LiF 
A)  0.045 M Al2(SO4)3 
B)  0.040 M (NH4)2CO3 
C)  0.10 M LiBr 
D)  0.15 M NaI 
E)  0.15 M LiF

Question 9

If 100.mL of 0.100 M Na2SO4 is added to 200.mL of 0.150 M NaCl,what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

Accepted Answer

A)  0.133 M 
B)  0.167 M 
C)  0.250 M 
D)  0.350 M 
A)  0.133 M 
B)  0.167 M 
C)  0.250 M 
D)  0.350 M

Question 10

How many milliliters of 0.550 M hydriodic acid are needed to react with 25.00 mL of 0.217 M CsOH?
HI(aq)+ CsOH(aq)→ CsI(aq)+ H2O(l)

Accepted Answer

A)  0.0158 mL 
B)  0.101 mL 
C)  9.86 mL 
D)  63.4 mL 
A)  0.0158 mL 
B)  0.101 mL 
C)  9.86 mL 
D)  63.4 mL

Question 11

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+   (g)→ 2 Li3N(s)
How many moles of   are needed to react with 0.550 mol of lithium?

Accepted Answer

A)  3.30 
B)  0.550 
C)  0.183 
D)  1.65 
E)  0.0917 
A)  3.30 
B)  0.550 
C)  0.183 
D)  1.65 
E)  0.0917

Question 12

Determine the reducing agent in the following reaction. 2 Li(s)+ Fe(C2H3O2)2(aq)→ 2 LiC2H3O2(aq)+ Fe(s)

Accepted Answer

A)  O 
B)  H 
C)  C 
D)  Fe 
E)  Li 
A)  O 
B)  H 
C)  C 
D)  Fe 
E)  Li

Question 13

What is the concentration (M)of sodium ions in 4.57 L of a 2.35 M Li3P solution?

Accepted Answer

A)  7.05 M 
B)  2.35 M 
C)  14.1 M 
D)  45.0 M 
E)  99.0 M 
A)  7.05 M 
B)  2.35 M 
C)  14.1 M 
D)  45.0 M 
E)  99.0 M

Question 14

There are ________ mol of bromide ions in 0.300 L of a 0.150M solution of AlBr3.

Accepted Answer

A)  0.135 
B)  0.045 
C)  0.450 
D)  3.30 
E)  2.00 
A)  0.135 
B)  0.045 
C)  0.450 
D)  3.30 
E)  2.00

Question 15

Define an Arrhenius base.

Accepted Answer

A)  an electron pair donor 
B)  an electron pair receiver 
C)  produces H+ ions in aqueous solution 
D)  accepts H+ ions 
E)  produces OH- ions in aqueous solution 
A)  an electron pair donor 
B)  an electron pair receiver 
C)  produces H+ ions in aqueous solution 
D)  accepts H+ ions 
E)  produces OH- ions in aqueous solution

Question 16

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of H2SO4 and KOH are mixed.

Accepted Answer

A)  H+(aq) + OH-(aq) → H2O(l) 
B)  2 K+(aq) + SO42-(aq) → K2SO4(s) 
C)  H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H2O(l) + 2 K+(aq) + SO42-(aq) 
D)  H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H+(aq) + OH-(aq) + K2SO4(s) 
E)  No reaction occurs. 
A)  H+(aq) + OH-(aq) → H2O(l) 
B)  2 K+(aq) + SO42-(aq) → K2SO4(s) 
C)  H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H2O(l) + 2 K+(aq) + SO42-(aq) 
D)  H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H+(aq) + OH-(aq) + K2SO4(s) 
E)  No reaction occurs.

Question 17

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed.

Accepted Answer

A)  Al3+(aq) + 3 NO3-(aq) → Al(NO3)3(s) 
B)  Li+(aq) + C2H3O2-(aq) → LiC2H3O2(s) 
C)  Al3+(aq) + 3 NO3-(aq) + Li+(aq) + C2H3O2-(aq) → Al(NO3)3(aq) + LiC2H3O2(s) 
D)  3 Li+(aq) + (C2H3O2)33-(aq) → Li3(C2H3O2)3(s) 
E)  No reaction occurs. 
A)  Al3+(aq) + 3 NO3-(aq) → Al(NO3)3(s) 
B)  Li+(aq) + C2H3O2-(aq) → LiC2H3O2(s) 
C)  Al3+(aq) + 3 NO3-(aq) + Li+(aq) + C2H3O2-(aq) → Al(NO3)3(aq) + LiC2H3O2(s) 
D)  3 Li+(aq) + (C2H3O2)33-(aq) → Li3(C2H3O2)3(s) 
E)  No reaction occurs.

Question 18

What volume (in mL)of 0.0887 M MgCl2 solution is needed to make 275.0 mL of 0.0224 M MgCl2 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 19

What is the concentration of an AlCl3 solution if 150.mL of the solution contains 250.mg of Cl- ion?

Accepted Answer

A)  1.57 × 10-2 M 
B)  3.75 × 10-2 M 
C)  4.70 × 10-2 M 
D)  1.41 × 10-1 M 
A)  1.57 × 10-2 M 
B)  3.75 × 10-2 M 
C)  4.70 × 10-2 M 
D)  1.41 × 10-1 M

Question 20

How many milliliters of a 0.184 M KNO3 solution contain 0.113 moles of KNO3?

Accepted Answer

A)  543 mL 
B)  163 mL 
C)  614 mL 
D)  885 mL 
E)  326 mL 
A)  543 mL 
B)  163 mL 
C)  614 mL 
D)  885 mL 
E)  326 mL

Exam 4: Chemical Quantities and Aqueous Reactions

Which of the following is a precipitation reaction?

Determine the oxidation state of iodine in I2.

8.0 g of iron is reacted with 8.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s)+ 4 H2O(l)→ Fe3O4(s)+ 4 H2(g)

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 1.55 g of carbonic acid? H2CO3 → H2O + CO2

What is the molarity of a potassium triiodide solution,KI3(aq),if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.500 M thiosulfate solution,K2S2O3(aq)? The chemical equation for the reaction is 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq).

Identify NaI.

Determine the molarity of a solution formed by dissolving 468 mg of MgI2 in enough water to yield 50.0 mL of solution.

Which of the following solutions will have the highest electrical conductivity?

If 100.mL of 0.100 M Na2SO4 is added to 200.mL of 0.150 M NaCl,what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

How many milliliters of 0.550 M hydriodic acid are needed to react with 25.00 mL of 0.217 M CsOH? HI(aq)+ CsOH(aq)→ CsI(aq)+ H2O(l)

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li3N(s) How many moles of are needed to react with 0.550 mol of lithium?

Determine the reducing agent in the following reaction. 2 Li(s)+ Fe(C2H3O2)2(aq)→ 2 LiC2H3O2(aq)+ Fe(s)

What is the concentration (M)of sodium ions in 4.57 L of a 2.35 M Li3P solution?

There are ________ mol of bromide ions in 0.300 L of a 0.150M solution of AlBr3.

Define an Arrhenius base.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of H2SO4 and KOH are mixed.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed.

What volume (in mL)of 0.0887 M MgCl2 solution is needed to make 275.0 mL of 0.0224 M MgCl2 solution?

What is the concentration of an AlCl3 solution if 150.mL of the solution contains 250.mg of Cl- ion?

How many milliliters of a 0.184 M KNO3 solution contain 0.113 moles of KNO3?

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

Determine the oxidation state of iodine in I₂.

8.0 g of iron is reacted with 8.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s)+ 4 H₂O(l)→ Fe₃O₄(s)+ 4 H₂(g)

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 1.55 g of carbonic acid? H₂CO₃ → H₂O + CO₂

What is the molarity of a potassium triiodide solution,KI₃(aq),if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.500 M thiosulfate solution,K₂S₂O₃(aq)? The chemical equation for the reaction is 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq).

Determine the molarity of a solution formed by dissolving 468 mg of MgI₂ in enough water to yield 50.0 mL of solution.

If 100.mL of 0.100 M Na₂SO₄ is added to 200.mL of 0.150 M NaCl,what is the concentration of Na⁺ ions in the final solution? Assume that the volumes are additive.

How many milliliters of 0.550 M hydriodic acid are needed to react with 25.00 mL of 0.217 M CsOH? HI(aq)+ CsOH(aq)→ CsI(aq)+ H₂O(l)

Lithium and nitrogen react to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li₃N(s) How many moles of are needed to react with 0.550 mol of lithium?

Determine the reducing agent in the following reaction. 2 Li(s)+ Fe(C₂H₃O₂)₂(aq)→ 2 LiC₂H₃O₂(aq)+ Fe(s)

What is the concentration (M)of sodium ions in 4.57 L of a 2.35 M Li₃P solution?

There are ________ mol of bromide ions in 0.300 L of a 0.150M solution of AlBr₃.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of H₂SO₄ and KOH are mixed.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C₂H₃O₂)₃ and LiNO₃ are mixed.

What volume (in mL)of 0.0887 M MgCl₂ solution is needed to make 275.0 mL of 0.0224 M MgCl₂solution?

What is the concentration of an AlCl₃ solution if 150.mL of the solution contains 250.mg of Cl^- ion?

How many milliliters of a 0.184 M KNO₃ solution contain 0.113 moles of KNO₃?