Question 1

Which of the following is an acid-base reaction?

Accepted Answer

A) C(s)+ O2(g)→ CO2(g) 
B) 2HClO4(aq)+ Ca(OH)2(aq)→ 2 H2O(l)+ Ca(ClO4)2(aq) 
C) Fe(s)+ 2AgNO3(aq)→ 2Ag(s)+ Fe(NO3)2(aq) 
D) MgSO4(aq)+ Ba(NO3)2(aq)→ Mg(NO3)2(aq)+ BaSO4(s) 
E) None of the above is an acid-base reaction. 
A) C(s)+ O2(g)→ CO2(g) 
B) 2HClO4(aq)+ Ca(OH)2(aq)→ 2 H2O(l)+ Ca(ClO4)2(aq) 
C) Fe(s)+ 2AgNO3(aq)→ 2Ag(s)+ Fe(NO3)2(aq) 
D) MgSO4(aq)+ Ba(NO3)2(aq)→ Mg(NO3)2(aq)+ BaSO4(s) 
E) None of the above is an acid-base reaction.

Question 2

Identify the polyprotic acid.

Accepted Answer

A) H2SO4 
B) HCl 
C) NaCl 
D) NaOH 
E) Li(OH)2 
A) H2SO4 
B) HCl 
C) NaCl 
D) NaOH 
E) Li(OH)2

Question 3

Calculate the concentration (molarity)of a solution prepared by dissolving 72.8 g C2H6O in 2.34 L of water.

Accepted Answer

A) 1.58 M 
B) 1.48 M 
C) 0.987 M 
D) 0.633 M 
E) 0.675 M 
A) 1.58 M 
B) 1.48 M 
C) 0.987 M 
D) 0.633 M 
E) 0.675 M

Question 4

Identify the oxidation state of Mg in Mg(s). 
Mg(s)+ 2HCl(aq)→ MgCl2(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 5

Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25 °C. The density of nitrogen monoxide at   is 1.23 g L-1. ________ NH3(g)+ ________ O2(g)→ ________ NO(g)+ ________ H2O(l)

Accepted Answer

A) 7.32 L 
B) 11.1 L 
C) 11.5 L 
D) 17.3 L 
A) 7.32 L 
B) 11.1 L 
C) 11.5 L 
D) 17.3 L

Question 6

A solution is prepared by adding 1.60 g of solid NaCl to 50.0 mL of 0.100 mol L-1 CaCl2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Accepted Answer

A) 0.747 
B) 0.647 
C) 0.132 
D) 0.232 
E) 0.547 
A) 0.747 
B) 0.647 
C) 0.132 
D) 0.232 
E) 0.547

Question 7

Metallic aluminum reacts with MnO2 at elevated temperatures to form manganese metal and aluminum oxide. A mixture of these two reactants is 67.2% mole percent Al. Find the theoretical yield (in grams)of manganese from the reaction of 250 g of this mixture.

Accepted Answer

A) 87.3 g 
B) 193 g 
C) 18.13 g 
D) 6.72 g 
E) 96.6 g 
A) 87.3 g 
B) 193 g 
C) 18.13 g 
D) 6.72 g 
E) 96.6 g

Question 8

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

Question 9

Lithium and nitrogen react to produce lithium nitride: 6Li(s)+ N2(g)→ 2Li3N(s)
How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Accepted Answer

A) 0.150 
B) 0.900 
C) 0.0750 
D) 1.35 
E) 0.225 
A) 0.150 
B) 0.900 
C) 0.0750 
D) 1.35 
E) 0.225

Question 10

Balance the chemical equation given below, and determine the number of millilitres of 0.00300 mol L-1 phosphoric acid required to neutralize 45.00 mL of 0.00150 mol L-1 calcium hydroxide. ________ Ca(OH)2(aq)+ ________ H3PO4(aq)→ ________ Ca3(PO4)2(aq)+ ________ H2O(l)

Accepted Answer

A) 3.04 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL 
A) 3.04 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL

Question 11

How can you tell if a reaction is an oxidation-reduction reaction?

Accepted Answer

At least one species is losing electrons

Question 12

Match the following.

-H2SO4(aq)+ 2LiOH(aq)→ 2H2O(l)+ Li2SO4(aq)

Accepted Answer

A) acid-base 
B) oxidation-reduction 
C) combustion 
D) gas evolution 
A) acid-base 
B) oxidation-reduction 
C) combustion 
D) gas evolution

Question 13

Identify 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) 2K+(aq)+ SO42-(aq)→ K2SO4(s) 
C) H+(aq)+ OH-(aq)+ 2K+(aq)+ SO42-(aq)→ H2O(l)+ K2SO4(s) 
D) H22+(aq)+ OH-(aq)→ H2(OH)2(l) 
E) No reaction occurs. 
A) H+(aq)+ OH-(aq)→ H2O(l) 
B) 2K+(aq)+ SO42-(aq)→ K2SO4(s) 
C) H+(aq)+ OH-(aq)+ 2K+(aq)+ SO42-(aq)→ H2O(l)+ K2SO4(s) 
D) H22+(aq)+ OH-(aq)→ H2(OH)2(l) 
E) No reaction occurs.

Question 14

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Accepted Answer

A) NH4NO3 + Li2CO3 
B) Hg2(NO3)2 + LiI 
C) NaCl + Li3PO4 
D) AgC2H3O2 + Cu(NO3)2 
E) None of the above solution pairs will produce a precipitate. 
A) NH4NO3 + Li2CO3 
B) Hg2(NO3)2 + LiI 
C) NaCl + Li3PO4 
D) AgC2H3O2 + Cu(NO3)2 
E) None of the above solution pairs will produce a precipitate.

Question 15

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 0.200 mol L-1 thiosulfate solution, K2S2O3(aq)? The chemical equation for the reaction is 2S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3I-(aq)

Accepted Answer

A) 0.0833 mol L-1 
B) 0.120 mol L-1 
C) 0.167 mol L-1 
D) 0.333 mol L-1 
A) 0.0833 mol L-1 
B) 0.120 mol L-1 
C) 0.167 mol L-1 
D) 0.333 mol L-1

Question 16

Describe the difference between complete ionic and net ionic equations.

Accepted Answer

A complete ionic equation shows all of t

Question 17

Which of the following compounds is soluble in water?

Accepted Answer

A) CaCl2 
B) MgCO3 
C) PbCl2 
D) BaSO4 
E) None of these compounds is soluble in water. 
A) CaCl2 
B) MgCO3 
C) PbCl2 
D) BaSO4 
E) None of these compounds is soluble in water.

Question 18

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

Accepted Answer

A) 0.045 mol L-1 Al2(SO4)3 
B) 0.050 mol L-1 (NH4)2CO3 
C) 0.10 mol L-1 LiBr 
D) 0.10 mol L-1 NaI 
E) 0.10 mol L-1 KF 
A) 0.045 mol L-1 Al2(SO4)3 
B) 0.050 mol L-1 (NH4)2CO3 
C) 0.10 mol L-1 LiBr 
D) 0.10 mol L-1 NaI 
E) 0.10 mol L-1 KF

Question 19

What is the concentration (M)of sodium ions in 4.57 L of a .398 mol L-1 Na3P solution?

Accepted Answer

Question 20

A solution is prepared by mixing 50.0 mL of 0.100 mol L-1 HCl and 10.0 mL of 0.200 mol L-1 NaCl. What is the molarity of chloride ion in this solution?

Accepted Answer

A) 0.183 
B) 8.57 
C) 3.50 
D) 0.0500 
E) 0.117 
A) 0.183 
B) 8.57 
C) 3.50 
D) 0.0500 
E) 0.117

Exam 4: Chemical Reactions and Stoichiometry

Which of the following is an acid-base reaction?

Identify the polyprotic acid.

Calculate the concentration (molarity)of a solution prepared by dissolving 72.8 g C2H6O in 2.34 L of water.

Identify the oxidation state of Mg in Mg(s). Mg(s)+ 2HCl(aq)→ MgCl2(aq)+ H2(g)

Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25 °C. The density of nitrogen monoxide at is 1.23 g L-1. ________ NH3(g)+ ________ O2(g)→ ________ NO(g)+ ________ H2O(l)

A solution is prepared by adding 1.60 g of solid NaCl to 50.0 mL of 0.100 mol L-1 CaCl2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Metallic aluminum reacts with MnO2 at elevated temperatures to form manganese metal and aluminum oxide. A mixture of these two reactants is 67.2% mole percent Al. Find the theoretical yield (in grams)of manganese from the reaction of 250 g of this mixture.

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

Lithium and nitrogen react to produce lithium nitride: 6Li(s)+ N2(g)→ 2Li3N(s) How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Balance the chemical equation given below, and determine the number of millilitres of 0.00300 mol L-1 phosphoric acid required to neutralize 45.00 mL of 0.00150 mol L-1 calcium hydroxide. ________ Ca(OH)2(aq)+ ________ H3PO4(aq)→ ________ Ca3(PO4)2(aq)+ ________ H2O(l)

How can you tell if a reaction is an oxidation-reduction reaction?

Match the following. -H2SO4(aq)+ 2LiOH(aq)→ 2H2O(l)+ Li2SO4(aq)

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

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

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 0.200 mol L-1 thiosulfate solution, K2S2O3(aq)? The chemical equation for the reaction is 2S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3I-(aq)

Describe the difference between complete ionic and net ionic equations.

Which of the following compounds is soluble in water?

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

What is the concentration (M)of sodium ions in 4.57 L of a .398 mol L-1 Na3P solution?

A solution is prepared by mixing 50.0 mL of 0.100 mol L-1 HCl and 10.0 mL of 0.200 mol L-1 NaCl. What is the molarity of chloride ion in this solution?

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Calculate the concentration (molarity)of a solution prepared by dissolving 72.8 g C₂H₆O in 2.34 L of water.

Identify the oxidation state of Mg in Mg(s). Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)

Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25 °C. The density of nitrogen monoxide at is 1.23 g L^-1. NH₃(g)+ O₂(g)→ NO(g)+ H₂O(l)

A solution is prepared by adding 1.60 g of solid NaCl to 50.0 mL of 0.100 mol L^-1 CaCl₂. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Metallic aluminum reacts with MnO₂ at elevated temperatures to form manganese metal and aluminum oxide. A mixture of these two reactants is 67.2% mole percent Al. Find the theoretical yield (in grams)of manganese from the reaction of 250 g of this mixture.

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

Lithium and nitrogen react to produce lithium nitride: 6Li(s)+ N₂(g)→ 2Li₃N(s) How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Balance the chemical equation given below, and determine the number of millilitres of 0.00300 mol L^-1 phosphoric acid required to neutralize 45.00 mL of 0.00150 mol L^-1 calcium hydroxide. Ca(OH)₂(aq)+ H₃PO₄(aq)→ Ca₃(PO₄)₂(aq)+ H₂O(l)

Match the following. -H₂SO₄(aq)+ 2LiOH(aq)→ 2H₂O(l)+ Li₂SO4(aq)

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

What is the concentration (M)of sodium ions in 4.57 L of a .398 mol L^-1 Na₃P solution?

A solution is prepared by mixing 50.0 mL of 0.100 mol L^-1 HCl and 10.0 mL of 0.200 mol L^-1 NaCl. What is the molarity of chloride ion in this solution?