Question 1

What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?

Accepted Answer

A) 4.48 × 10-4 M 
B) 0.448 M 
C) 2.23 M 
D) 2.23 × 103 M 
A) 4.48 × 10-4 M 
B) 0.448 M 
C) 2.23 M 
D) 2.23 × 103 M B

Question 2

According to the balanced equation shown below,4.00 moles of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-.
5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

Accepted Answer

A) 1.60 
B) 4.00 
C) 8.00 
D) 9.00 
A) 1.60 
B) 4.00 
C) 8.00 
D) 9.00 A

Question 3

A solution is prepared by mixing 50.0 mL of 0.100 M HCl and 10.0 mL of 0.200 M 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 E

Question 4

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of lithium sulfide and copper (II)nitrate are mixed.

Accepted Answer

A) Li+(aq)+ SO42-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ Li+(aq)+ NO3-(aq) 
B) Li+(aq)+ S-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ LiNO3(aq) 
C) 2 Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2 NO3-(aq)→ Cu2+(aq)+ S2-(aq)+ 2 LiNO3(s) 
D) 2 Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2 NO3-(aq)→ CuS(s)+ 2 Li+(aq)+ 2 NO3-(aq) 
E) No reaction occurs. 
A) Li+(aq)+ SO42-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ Li+(aq)+ NO3-(aq) 
B) Li+(aq)+ S-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ LiNO3(aq) 
C) 2 Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2 NO3-(aq)→ Cu2+(aq)+ S2-(aq)+ 2 LiNO3(s) 
D) 2 Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2 NO3-(aq)→ CuS(s)+ 2 Li+(aq)+ 2 NO3-(aq) 
E) No reaction occurs.

Question 5

What is the concentration of HCl in the final solution when 65 mL of a 12 M HCl solution is diluted with pure water to a total volume of 0.15 L?

Accepted Answer

A) 2.8 × 10-2 M 
B) 5.2 M 
C) 28 M 
D) 5.2 × 103 M 
A) 2.8 × 10-2 M 
B) 5.2 M 
C) 28 M 
D) 5.2 × 103 M

Question 6

How many grams of oxygen are formed when 6.21 moles of KOH are formed?
4 KO(s)+ 2 H2O(l)→ 4 KOH(s)+ O2(g)

Accepted Answer

A) 19.9 g O2 
B) 27.9 g O2 
C) 49.7 g O2 
D) 3.59 g O2 
E) 11.7 g O2 
A) 19.9 g O2 
B) 27.9 g O2 
C) 49.7 g O2 
D) 3.59 g O2 
E) 11.7 g O2

Question 7

Choose the reaction that represents the combustion of C6H12O2.

Accepted Answer

A) C6H12O2(l)+ 8 O2(g)→ 6 CO2(g)+ 6 H2O(g) 
B) Mg(s)+ C6H12O2(l)→ MgC6H12O2(aq) 
C) 6 C(s)+ 6 H2(g)+ O2(g)→ C6H12O2(l) 
D) C6H12O2(l)→ 6 C(s)+ 6 H2(g)+ O2(g) 
E) None of the above represent the combustion of C6H12O2. 
A) C6H12O2(l)+ 8 O2(g)→ 6 CO2(g)+ 6 H2O(g) 
B) Mg(s)+ C6H12O2(l)→ MgC6H12O2(aq) 
C) 6 C(s)+ 6 H2(g)+ O2(g)→ C6H12O2(l) 
D) C6H12O2(l)→ 6 C(s)+ 6 H2(g)+ O2(g) 
E) None of the above represent the combustion of C6H12O2.

Question 8

How many of the following compounds are insoluble in water?
KC2H3O2  CaSO4 SrS AlPO4

Accepted Answer

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

Question 9

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

Accepted Answer

A) 0.150 M 
B) 0.450 M 
C) 1.35 M 
D) 1.80 M 
A) 0.150 M 
B) 0.450 M 
C) 1.35 M 
D) 1.80 M

Question 10

A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3).If ammonia is the only product,what mass of ammonia is formed?

Accepted Answer

A) 17.01 g 
B) 1.10 g 
C) 14.01 g 
D) 3.02 g 
E) 23.07 g 
A) 17.01 g 
B) 1.10 g 
C) 14.01 g 
D) 3.02 g 
E) 23.07 g

Question 11

Consider the following balanced reaction.What mass (in g)of CO2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present.
C3H7SH(l)+ 6 O2(g)→ 3 CO2(g)+ SO2(g)+ 4 H2O(g)

Accepted Answer

A) 0.396 g CO2 
B) 0.209 g CO2 
C) 0.792 g CO2 
D) 0.126 g CO2 
E) 0.198 g CO2 
A) 0.396 g CO2 
B) 0.209 g CO2 
C) 0.792 g CO2 
D) 0.126 g CO2 
E) 0.198 g CO2

Question 12

The titration of 80.0 mL of an unknown concentration H3PO4 solution requires 126 mL of 0.218 M KOH solution.What is the concentration of the H3PO4 solution (in M)?

Accepted Answer

A) 1.03 M 
B) 0.343 M 
C) 0.114 M 
D) 0.138 M 
E) 0.0461 M 
A) 1.03 M 
B) 0.343 M 
C) 0.114 M 
D) 0.138 M 
E) 0.0461 M

Question 13

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq)are produced?
3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

Accepted Answer

A) 30.8 g 
B) 41.1 g 
C) 54.8 g 
D) 69.3 g 
A) 30.8 g 
B) 41.1 g 
C) 54.8 g 
D) 69.3 g

Question 14

How many grams of NaCl are required to make 250.0 mL of a 3.000 M solution?

Accepted Answer

A) 58.40 g 
B) 175.3 g 
C) 14.60 g 
D) 43.83 g 
A) 58.40 g 
B) 175.3 g 
C) 14.60 g 
D) 43.83 g

Question 15

Pure acetic acid (HC2H3O2)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

Accepted Answer

A) 1.26 × 103 M 
B) 21.0 M 
C) 0.0210 M 
D) 0.350 M 
E) 3.50 × 10-4 M 
A) 1.26 × 103 M 
B) 21.0 M 
C) 0.0210 M 
D) 0.350 M 
E) 3.50 × 10-4 M

Question 16

How many milliliters of a 0.184 M NaNO3 solution contain 0.113 moles of NaNO3?

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

Question 17

Balance the chemical equation given below,and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 45.00 mL of 0.00150 M 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 18

According to the following reaction,what amount of Al2S3 remains when 20.00 g of Al2S3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows: Al2S3 = 150.17 g/mol,H2O = 18.02 g/mol.
Al2S3(s)+ 6 H2O(l)→ 2 Al(OH)3(s)+ 3 H2S(g)

Accepted Answer

A) 28.33 g 
B) 14.00 g 
C) 8.33 g 
D) 19.78 g 
E) 17.22 g 
A) 28.33 g 
B) 14.00 g 
C) 8.33 g 
D) 19.78 g 
E) 17.22 g

Question 19

What is the net ionic reaction for the following reaction in aqueous solutions:
AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq)

Accepted Answer

A) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
B) Ag+(aq)+ Cl-(aq)→ AgCl(s) 
C) Ag+(aq)+NO3-(aq)+Na+(aq)+ Cl- (aq)→ Ag+(aq)+NO3-(aq)+ Na+(aq)+ Cl- (aq) 
D) Ag+(aq)+NO3-(aq)+Na+(aq)+ Cl- (aq)→ AgCl(s)+Na+(aq)+ NO3-(aq) 
A) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
B) Ag+(aq)+ Cl-(aq)→ AgCl(s) 
C) Ag+(aq)+NO3-(aq)+Na+(aq)+ Cl- (aq)→ Ag+(aq)+NO3-(aq)+ Na+(aq)+ Cl- (aq) 
D) Ag+(aq)+NO3-(aq)+Na+(aq)+ Cl- (aq)→ AgCl(s)+Na+(aq)+ NO3-(aq)

Question 20

What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction:
BrO3-(aq)+ H+(aq)→ Br-(aq)+ H2O(l)?

Accepted Answer

A) -7 
B) -6 
C) +6 
D) +7 
A) -7 
B) -6 
C) +6 
D) +7

What is the concentration of FeCl₃ in a solution prepared by dissolving 20.0 g of FeCl₃ in enough water to make 275 mL of solution?

According to the balanced equation shown below,4.00 moles of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ Mn²⁺(aq)+ 8 H₂O(l)

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

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of lithium sulfide and copper (II)nitrate are mixed.

What is the concentration of HCl in the final solution when 65 mL of a 12 M HCl solution is diluted with pure water to a total volume of 0.15 L?

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4 KO(s)+ 2 H₂O(l)→ 4 KOH(s)+ O₂(g)

Choose the reaction that represents the combustion of C₆H₁₂O₂.

How many of the following compounds are insoluble in water? KC₂H₃O₂ CaSO₄ SrS AlPO₄

What is the molar concentration of sodium ions in a 0.450 M Na₃PO₄ solution?

A 14.01 g sample of N₂ reacts with 3.02 g of H₂ to form ammonia (NH₃).If ammonia is the only product,what mass of ammonia is formed?

Consider the following balanced reaction.What mass (in g)of CO₂ can be formed from 288 mg of O₂? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6 O₂(g)→ 3 CO₂(g)+ SO₂(g)+ 4 H₂O(g)

The titration of 80.0 mL of an unknown concentration H₃PO₄ solution requires 126 mL of 0.218 M KOH solution.What is the concentration of the H₃PO₄ solution (in M)?

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO₂ are consumed in the reaction,how many grams of nitric acid,HNO₃(aq)are produced? 3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g)

How many grams of NaCl are required to make 250.0 mL of a 3.000 M solution?

Pure acetic acid (HC₂H₃O₂)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

How many milliliters of a 0.184 M NaNO₃ solution contain 0.113 moles of NaNO₃?

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

According to the following reaction,what amount of Al₂S₃ remains when 20.00 g of Al₂S₃ and 2.00 g of H₂O are reacted? A few of the molar masses are as follows: Al₂S₃= 150.17 g/mol,H₂O = 18.02 g/mol. Al₂S₃(s)+ 6 H₂O(l)→ 2 Al(OH)₃(s)+ 3 H₂S(g)

What is the net ionic reaction for the following reaction in aqueous solutions: AgNO₃(aq)+ NaCl(aq)→ AgCl(s)+ NaNO₃(aq)

What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction: BrO₃^-(aq)+ H⁺(aq)→ Br^-(aq)+ H₂O(l)?

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Exam 4: Chemical Quantities and Aqueous Reactions

What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?

According to the balanced equation shown below,4.00 moles of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

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

Give the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of lithium sulfide and copper (II)nitrate are mixed.

What is the concentration of HCl in the final solution when 65 mL of a 12 M HCl solution is diluted with pure water to a total volume of 0.15 L?

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4 KO(s)+ 2 H2O(l)→ 4 KOH(s)+ O2(g)

Choose the reaction that represents the combustion of C6H12O2.

How many of the following compounds are insoluble in water? KC2H3O2 CaSO4 SrS AlPO4

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3).If ammonia is the only product,what mass of ammonia is formed?

Consider the following balanced reaction.What mass (in g)of CO2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present. C3H7SH(l)+ 6 O2(g)→ 3 CO2(g)+ SO2(g)+ 4 H2O(g)

The titration of 80.0 mL of an unknown concentration H3PO4 solution requires 126 mL of 0.218 M KOH solution.What is the concentration of the H3PO4 solution (in M)?

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq)are produced? 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

How many grams of NaCl are required to make 250.0 mL of a 3.000 M solution?

Pure acetic acid (HC2H3O2)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

How many milliliters of a 0.184 M NaNO3 solution contain 0.113 moles of NaNO3?

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

According to the following reaction,what amount of Al2S3 remains when 20.00 g of Al2S3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows: Al2S3 = 150.17 g/mol,H2O = 18.02 g/mol. Al2S3(s)+ 6 H2O(l)→ 2 Al(OH)3(s)+ 3 H2S(g)

What is the net ionic reaction for the following reaction in aqueous solutions: AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq)

What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction: BrO3-(aq)+ H+(aq)→ Br-(aq)+ H2O(l)?

Matter, Measurement, and Problem Solving

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Molecules, Compounds and Chemical Equations

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Thermochemistry

The Quantum-Mechanical Model of the Atom

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Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

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What is the concentration of FeCl₃ in a solution prepared by dissolving 20.0 g of FeCl₃ in enough water to make 275 mL of solution?

According to the balanced equation shown below,4.00 moles of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ Mn²⁺(aq)+ 8 H₂O(l)

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4 KO(s)+ 2 H₂O(l)→ 4 KOH(s)+ O₂(g)

Choose the reaction that represents the combustion of C₆H₁₂O₂.

How many of the following compounds are insoluble in water? KC₂H₃O₂ CaSO₄ SrS AlPO₄

What is the molar concentration of sodium ions in a 0.450 M Na₃PO₄ solution?

A 14.01 g sample of N₂ reacts with 3.02 g of H₂ to form ammonia (NH₃).If ammonia is the only product,what mass of ammonia is formed?

Consider the following balanced reaction.What mass (in g)of CO₂ can be formed from 288 mg of O₂? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6 O₂(g)→ 3 CO₂(g)+ SO₂(g)+ 4 H₂O(g)

The titration of 80.0 mL of an unknown concentration H₃PO₄ solution requires 126 mL of 0.218 M KOH solution.What is the concentration of the H₃PO₄ solution (in M)?

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO₂ are consumed in the reaction,how many grams of nitric acid,HNO₃(aq)are produced? 3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g)

Pure acetic acid (HC₂H₃O₂)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

How many milliliters of a 0.184 M NaNO₃ solution contain 0.113 moles of NaNO₃?

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

According to the following reaction,what amount of Al₂S₃ remains when 20.00 g of Al₂S₃ and 2.00 g of H₂O are reacted? A few of the molar masses are as follows: Al₂S₃= 150.17 g/mol,H₂O = 18.02 g/mol. Al₂S₃(s)+ 6 H₂O(l)→ 2 Al(OH)₃(s)+ 3 H₂S(g)

What is the net ionic reaction for the following reaction in aqueous solutions: AgNO₃(aq)+ NaCl(aq)→ AgCl(s)+ NaNO₃(aq)

What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction: BrO₃^-(aq)+ H⁺(aq)→ Br^-(aq)+ H₂O(l)?