Question 1

Aqueous solutions of barium chloride and silver nitrate are mixed to form solid silver chloride and aqueous barium nitrate.
-The balanced molecular equation contains which one of the following terms?

Accepted Answer

A)  AgCl (s) 
B)  2AgCl (s) 
C)  2Ba(NO3) 2 (aq) 
D)  BaNO3 (aq) 
E)  3AgCl (aq)

Question 2

When solutions of carbonic acid and potassium hydroxide react,which of the following are NOT present in the complete ionic equation?

Accepted Answer

A)  hydrogen ion
B)  carbonate ion
C)  potassium ion
D)  hydroxide ion
E)  water

Question 3

The following reactions: 
Pb2+ + 2I-  →	o→  PbI2
 2Ce4+ + 2I-  →	o→  I2 + 2Ce3+
 HOAc + NH3  →	o→ NH4+ + OAc-
Are examples of

Accepted Answer

A)  acid-base reactions
B)  unbalanced reactions
C)  precipitation,acid-base,and redox reactions,respectively
D)  redox,acid-base,and precipitation reactions,respectively
E)  precipitation,redox,and acid-base reactions,respectively

Question 4

-Formation of hydrogen gas

Accepted Answer

2K + H<sub...

Question 5

You have exposed electrodes of a light bulb in a solution of H2SO4 such that the light bulb is on.You add a dilute solution and the bulb grows dim.Which of the following could be in the solution?

Accepted Answer

A)  Ba(OH) 2
B)  NaNO3
C)  K2SO4
D)  Cu(NO3) 2
E)  none of these

Question 6

In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid,the products are:

Accepted Answer

A)  NaSO4 + H2O
B)  NaSO3 + 2H2O
C)  2NaSO4 + H2O
D)  Na2S + 2H2O
E)  Na2SO4 + 2H2O

Question 7

Selecting from the following reagents,indicate which reagents would be mixed to give the compounds described.
CuSOS1U1B14S1U1B0(aq)
FeS1U1B12S1U1B0(COS1U1B13S1U1B0)S1U1B13S1U1B0(s)
NHS1U1B13S1U1B0(aq)
CuCOS1U1B13S1U1B0(s)
FeClS1U1B13S1U1B0(aq)
NaS1U1B12S1U1B0SOS1U1B14S1U1B0(aq)
Cr(OH)S1U1B13S1U1B0(s)
HS1U1B12S1U1B0SOS1U1B14S1U1B0(aq)
-FeCl3(aq)+ Na2SO4(aq)

Accepted Answer

Question 8

The oxidation state of iodine in IO3- is:

Accepted Answer

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

Question 9

The net ionic equation contains which of the following terms?

Accepted Answer

A)  Ag+(aq) 
B)  Ba2+(aq) 
C)  NO3- (aq) 
D)  H+ (aq) 
E)  AgCl(aq)

Question 10

Which of the following reactions does not involve oxidation-reduction?

Accepted Answer

A)  CH4 + 3O2  →	o→  2H2O + CO2
B)  Zn + 2HCl  →	o→  ZnCl2 + H2
C)  2Na + 2H2O  →	o→  2NaOH + H2
D)  MnO2 + 4HCl  →	o→  Cl2 + 2H2O + MnCl2
E)  All are oxidation-reduction reactions.

Question 11

Which of the following ions is most likely to form an insoluble sulfate?

Accepted Answer

A)  K+
B)  Li+
C)  Ca2+
D)  S2-
E)  Cl-

Question 12

Consider the following unbalanced oxidation-reduction reaction:
 Fe2+ + Br2 →	o→ Fe3+ + Br-
 In the balanced equation,the number of electrons transferred is

Accepted Answer

A)  1
B)  3
C)  2
D)  4
E)  none of these

Question 13

A 74.28-g sample of Ba(OH) 2 is dissolved in enough water to make 2.450 liters of solution.How many mL of this solution must be diluted with water in order to make 1.000 L of 0.100 M Ba(OH) 2?

Accepted Answer

A)  565 mL
B)  177 mL
C)  17.7 mL
D)  4.34 mL
E)  231 mL

Question 14

How many of the following are oxidation-reduction reactions? 
NaOH + HCl  →	o→  NaCl + H2O
Cu + 2AgNO3  →	o→ 2Ag + Cu(NO3) 2
Mg(OH) 2  →	o→  MgO + H2O
N2 + 3H2  →	o→  2NH3

Accepted Answer

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

Question 15

Write balanced equations for each of the processes,choosing from the following substances as reactants:

-Precipitation of BaSO4 from solution

Accepted Answer

H<sub>2</sub>SO<sub>...

Question 16

A molecule with an unequal charge distribution is said to be a __________ molecule.

Accepted Answer

The answer of A molecule with an unequal charge distribution...

Question 17

A mixture of BaCl2 and NaCl is analyzed by precipitating all the barium as BaSO4.After addition of an excess of Na2SO4 to a 3.725-g sample of the mixture,the mass of precipitate collected is 2.734 g.What is the mass percentage of barium chloride in the mixture?

Accepted Answer

A)  82.28%
B)  73.40%
C)  43.18%
D)  65.47%
E)  19.60%

Question 18

You mix 55 mL of 1.00 M silver nitrate with 25 mL of 0.84 M sodium chloride.What mass of silver chloride should you form?

Accepted Answer

A)  3.0 g
B)  6.0 g
C)  3.3 g
D)  6.6
E)  none of these

Question 19

An unknown diprotic acid requires 44.39 mL of 0.111 M NaOH to completely neutralize a 0.580-g sample.Calculate the approximate molar mass of the acid.

Accepted Answer

A)  406 g/mol
B)  235 g/mol
C)  118 g/mol
D)  59 g/mol
E)  203 g/mol

Question 20

For the reaction 4FeCl2(aq) + 3O2(g)  →	o→  2Fe2O3(s) + 4Cl2(g) ,what volume of a 0.760 M solution of FeCl2 is required to react completely with 6.36  ×	imes×  1021 molecules of O2?

Accepted Answer

A)  5.26  ×	imes×  103 mL
B)  10.7 mL
C)  10.4 mL
D)  18.5 mL
E)  6.02 mL

Exam 4: Chemical Reactions and Solutions Stoichiometry

For the reaction 4FeCl2(aq) + 3O2(g) →\to→ 2Fe2O3(s) + 4Cl2(g) ,what volume of a 0.760 M solution of FeCl2 is required to react completely with 6.36 ×\times× 1021 molecules of O2?

Correct AnswerverifiedShow Answer

A mixture of BaCl2 and NaCl is analyzed by precipitating all the barium as BaSO4.After addition of an excess of Na2SO4 to a 3.725-g sample of the mixture,the mass of precipitate collected is 2.734 g.What is the mass percentage of barium chloride in the mixture?

Correct AnswerverifiedShow Answer

You have exposed electrodes of a light bulb in a solution of H2SO4 such that the light bulb is on.You add a dilute solution and the bulb grows dim.Which of the following could be in the solution?

Correct AnswerverifiedShow Answer

When solutions of carbonic acid and potassium hydroxide react,which of the following are NOT present in the complete ionic equation?

Correct AnswerverifiedShow Answer

Write balanced equations for each of the processes,choosing from the following substances as reactants: -Precipitation of BaSO4 from solution

Correct AnswerverifiedH2SO...View AnswerShow Answer

Which of the following ions is most likely to form an insoluble sulfate?

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A 74.28-g sample of Ba(OH) 2 is dissolved in enough water to make 2.450 liters of solution.How many mL of this solution must be diluted with water in order to make 1.000 L of 0.100 M Ba(OH) 2?

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How many of the following are oxidation-reduction reactions? NaOH + HCl →\to→ NaCl + H2O Cu + 2AgNO3 →\to→ 2Ag + Cu(NO3) 2 Mg(OH) 2 →\to→ MgO + H2O N2 + 3H2 →\to→ 2NH3

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The net ionic equation contains which of the following terms?

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Which of the following reactions does not involve oxidation-reduction?

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Aqueous solutions of barium chloride and silver nitrate are mixed to form solid silver chloride and aqueous barium nitrate. -The balanced molecular equation contains which one of the following terms?

Correct AnswerverifiedShow Answer

An unknown diprotic acid requires 44.39 mL of 0.111 M NaOH to completely neutralize a 0.580-g sample.Calculate the approximate molar mass of the acid.

Correct AnswerverifiedShow Answer

-Formation of hydrogen gas

Correct Answerverified2K + HView AnswerShow Answer

In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid,the products are:

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A molecule with an unequal charge distribution is said to be a __________ molecule.

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Selecting from the following reagents,indicate which reagents would be mixed to give the compounds described. CuSO4(aq) Fe2(CO3)3(s) NH3(aq) CuCO3(s) FeCl3(aq) Na2SO4(aq) Cr(OH)3(s) H2SO4(aq) -FeCl3(aq)+ Na2SO4(aq)

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You mix 55 mL of 1.00 M silver nitrate with 25 mL of 0.84 M sodium chloride.What mass of silver chloride should you form?

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Consider the following unbalanced oxidation-reduction reaction: Fe2+ + Br2 →\to→ Fe3+ + Br- In the balanced equation,the number of electrons transferred is

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The following reactions: Pb2+ + 2I- →\to→ PbI2 2Ce4+ + 2I- →\to→ I2 + 2Ce3+ HOAc + NH3 →\to→ NH4+ + OAc- Are examples of

Correct AnswerverifiedShow Answer

The oxidation state of iodine in IO3- is:

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For the reaction 4FeCl₂(aq) + 3O₂(g) $\to$ 2Fe₂O₃(s) + 4Cl₂(g) ,what volume of a 0.760 M solution of FeCl₂ is required to react completely with 6.36 $\times$ 10²¹ molecules of O₂?

Correct Answer
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A mixture of BaCl₂ and NaCl is analyzed by precipitating all the barium as BaSO₄.After addition of an excess of Na₂SO₄ to a 3.725-g sample of the mixture,the mass of precipitate collected is 2.734 g.What is the mass percentage of barium chloride in the mixture?

Correct Answer
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You have exposed electrodes of a light bulb in a solution of H₂SO₄ such that the light bulb is on.You add a dilute solution and the bulb grows dim.Which of the following could be in the solution?

Correct Answer
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Write balanced equations for each of the processes,choosing from the following substances as reactants: -Precipitation of BaSO₄ from solution

Correct Answer
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H₂SO_...
View Answer

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A 74.28-g sample of Ba(OH) ₂ is dissolved in enough water to make 2.450 liters of solution.How many mL of this solution must be diluted with water in order to make 1.000 L of 0.100 M Ba(OH) ₂?

Correct Answer
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How many of the following are oxidation-reduction reactions? NaOH + HCl $\to$ NaCl + H₂O Cu + 2AgNO₃ $\to$ 2Ag + Cu(NO₃) ₂ Mg(OH) ₂ $\to$ MgO + H₂O N₂+ 3H₂ $\to$ 2NH₃

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2K + H
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Selecting from the following reagents,indicate which reagents would be mixed to give the compounds described. CuSO₄(aq) Fe₂(CO₃)₃(s) NH₃(aq) CuCO₃(s) FeCl₃(aq) Na₂SO₄(aq) Cr(OH)₃(s) H₂SO₄(aq) -FeCl₃(aq)+ Na₂SO₄(aq)

Correct Answer
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Consider the following unbalanced oxidation-reduction reaction: Fe²⁺ + Br₂ $\to$ Fe³⁺ + Br^- In the balanced equation,the number of electrons transferred is

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The following reactions: Pb²⁺ + 2I^- $\to$ PbI₂ 2Ce⁴⁺+ 2I^- $\to$ I₂ + 2Ce³⁺ HOAc + NH₃ $\to$ NH₄⁺ + OAc^- Are examples of

Correct Answer
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The oxidation state of iodine in IO₃^- is:

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