Question 1

K is element being oxidized in the following reaction.
2KBr + F2 $\rarr$  Br2 + 2KF

Accepted Answer

A) True 
 B)False

Question 2

Which of the following compounds is a weak electrolyte

Accepted Answer

A)   HNO3
B)   NaNO3
C)   HNO2
D)   NaNO2
E)   NaOH

Question 3

During a titration the following data were collected. A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200. mL of the base was required to neutralize the sample. How many grams of HCl are present in 500. mL of this acid solution

Accepted Answer

A)   46.5 g
B)   36.5 g
C)   26.5 g
D)   16.5 g
E)   None of the above

Question 4

A piece of lead metal was added to an aqueous solution of copper(II)  nitrate, and within a few minutes it was observed that the lead turned black and crumbled. The characteristic blue solution of copper (II)  ions had faded. (NOTE: Lead forms a 2+ ion when it reacts.)  Select the balanced chemical equation for this reaction.

Accepted Answer

A)   Pb(s)  + CuNO3(aq)   →\rarr→  Cu(s)  + Pb(NO3) 2(aq) 
B)   2Pb(s)  + Cu(NO3) 2(aq)   →\rarr→  Cu(s)  + 2Pb(NO3) 2(aq) 
C)   Pb(s)  + Cu(NO3) 2(aq)   →\rarr→  2 Cu(s)  + Pb(NO3) 2(aq) 
D)   Pb(s)  + Cu(NO3) 2(aq)   →\rarr→  Cu(s)  + Pb(NO3) 2(aq) 
E)   None of the above

Question 5

Select the compound in which sulfur has its highest possible oxidation number.

Accepted Answer

A)   H2S
B)   SO2
C)   SCl2
D)   H2SO3
E)   Na2SO4

Question 6

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displacement, or disproportionation reaction.
Ba(C2H3O2) 2(aq)  + Na2CO3(aq)   →\rarr→  BaCO3(s)  + 2 NaC2H3O2(aq)

Accepted Answer

A)   Acid-Base Neutralization
B)   Precipitation
C)   Decomposition
D)   Combustion
E)   Disproportionation

Question 7

Identify the reducing agent in the following chemical reaction.
Cd + NiO2 + 2H2O  →\rarr→  Cd(OH) 2 + Ni(OH) 2

Accepted Answer

A)   Cd
B)   NiO2
C)   H2O
D)   Cd(OH) 2
E)   Ni(OH) 2

Question 8

Identify the major ionic species present in an aqueous solution of Na2CO3.

Accepted Answer

A)   Na2+, CO32-
B)   Na2+, C2 -, O3
C)   Na+, C4+, O32-
D)   Na+, C+, O2-
E)   Na+, CO32-

Question 9

Which represents the oxidation number of each of the elements in BaNaPO4

Accepted Answer

A)   +2; +1; +4; -2
B)   +1; +1; -5; -2
C)   +2; +4; +5; +2
D)   +2; +1; +5; -2
E)   +1; +2; +5; -2

Question 10

The following experiments were carried out and observations recorded.
Expt. #1: copper metal was added to an aqueous solution of silver nitrate Observation: The copper become coated with a substance.
Expt. #2: lead metal was added to an aqueous solution of copper(II)  nitrate
Observation: The lead turned black and crumbled.
Expt. #3: zinc metal was added to an aqueous solution of lead(II)  nitrate
Observation: The zinc appeared to fall apart.Which, if any, of the following properly ranks the metals from most active to least active.

Accepted Answer

A)   Most active Pb, next most active Zn, next most active Cu, least active Ag
B)   Most active Zn, next most active Ag, next most active Cu, least active Pb
C)   Most active Zn, next most active Cu, next most active Pb, least active Ag
D)   Most active Zn, next most active Pb, next most active Cu, least active Ag
E)   None of the above

Question 11

Which of the following compounds is a strong acid

Accepted Answer

A)   HF
B)   HI
C)   HClO2
D)   H2SO3
E)   HNO2

Question 12

Hydrogen is oxidized in the following chemical reaction.H2 + Cl2 $\rarr$ 2HCl

Accepted Answer

A) True 
 B)False

Question 13

If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution. What would the molarity of the resulting solution be

Accepted Answer

A)   0.956 M
B)   0.856 M
C)   0.756 M
D)   0.656 M
E)   None of the above

Question 14

Which of the following will occur when solutions of ZnSO4(aq)  and MgCl2(aq)  are mixed

Accepted Answer

A)   A precipitate of ZnCl2 will form; Mg2+ and SO42- will be spectator ions.
B)   A precipitate of ZnSO4 will form ; Mg2+ and Cl- will be spectator ions.
C)   A precipitate of MgSO4 will form ; Zn2+ and Cl- will be spectator ions.
D)   A precipitate of MgCl2 will form ; Zn2+ and SO42- will be spectator ions.
E)   No precipitate will form.

Question 15

In the following chemical reaction the oxidizing agent is 
5S + 6KNO3 + 2CaCO3  →\rarr→  3K2SO4 + 2CaSO4 + CO2 + 3N2

Accepted Answer

A)   S
B)   N2
C)   KNO3
D)   CaSO4
E)   CaCO3

Question 16

Which, if any of the following correctly shows the balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II)  nitrate are combined.

Accepted Answer

A)  2KI(aq)  + Pb(NO3) 2(aq)   →\rarr→  PbI2(s)  + KNO3(aq) 
B)  KI(aq)  + Pb(NO3) 2(aq)   →\rarr→  PbI2(s)  + 2KNO3(aq) 
C)  2KI(aq)  + Pb(NO3) 2(aq)   →\rarr→  PbI2(s)  + 2KNO3(aq) 
D)  2KI(aq)  + 2Pb(NO3) 2(aq)   →\rarr→  PbI2(s)  + 2KNO3(aq) 
E)   None of the above

Question 17

Determine the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula.

Accepted Answer

A)   -2, +6, -2.
B)   -1, +4, -3
C)   +2, +4, -2 
D)   +1, +4, -2
E)   +1, +6, -6

Question 18

What mass of C6H12O6 (glucose)  is needed to prepare 450. mL of a 0.650 M solution of glucose in water

Accepted Answer

A)   0.293 g
B)   293 g
C)   0.692 g
D)   52.7 g
E)   125 g

Question 19

H2CO3 is an example of a diproticacid.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following compounds is a strong electrolyte

Accepted Answer

A)   H2O
B)   N2
C)   CH3COOH (acetic acid) 
D)   CH3CH2OH (ethanol) 
E)   KOH

Exam 4: Reactions in Aqueous Solutions

Which, if any of the following correctly shows the balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II) nitrate are combined.

Correct Answer
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In the following chemical reaction the oxidizing agent is 5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

Correct Answer
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Select the compound in which sulfur has its highest possible oxidation number.

Correct Answer
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Correct Answer
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Which represents the oxidation number of each of the elements in BaNaPO₄

Correct Answer
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Which of the following compounds is a strong acid

Correct Answer
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K is element being oxidized in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

Correct Answer
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Correct Answer
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H₂CO₃ is an example of a diproticacid.

Correct Answer
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Identify the reducing agent in the following chemical reaction. Cd + NiO₂ + 2H₂O $\rarr$ Cd(OH) ₂ + Ni(OH) ₂

Correct Answer
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During a titration the following data were collected. A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200. mL of the base was required to neutralize the sample. How many grams of HCl are present in 500. mL of this acid solution

Correct Answer
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Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displacement, or disproportionation reaction. Ba(C₂H₃O₂) ₂(aq) + Na₂CO₃(aq) $\rarr$ BaCO₃(s) + 2 NaC₂H₃O₂(aq)

Correct Answer
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If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution. What would the molarity of the resulting solution be

Correct Answer
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What mass of C₆H₁₂O₆ (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in water

Correct Answer
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Determine the correct oxidation numbers for all three elements in Rb₂SO₃ in the order that the elements are shown in the formula.

Correct Answer
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Which of the following will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed

Correct Answer
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Identify the major ionic species present in an aqueous solution of Na₂CO₃.

Correct Answer
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Which of the following compounds is a strong electrolyte

Correct Answer
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Hydrogen is oxidized in the following chemical reaction.H₂ + Cl₂ $\rarr$ 2HCl

Correct Answer
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Which of the following compounds is a weak electrolyte

Correct Answer
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Exam 4: Reactions in Aqueous Solutions

Which, if any of the following correctly shows the balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II) nitrate are combined.

Correct AnswerverifiedShow Answer

In the following chemical reaction the oxidizing agent is 5S + 6KNO3 + 2CaCO3 →\rarr→ 3K2SO4 + 2CaSO4 + CO2 + 3N2

Correct AnswerverifiedShow Answer

Select the compound in which sulfur has its highest possible oxidation number.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which represents the oxidation number of each of the elements in BaNaPO4

Correct AnswerverifiedShow Answer

Which of the following compounds is a strong acid

Correct AnswerverifiedShow Answer

K is element being oxidized in the following reaction. 2KBr + F2 →\rarr→ Br2 + 2KF

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

H2CO3 is an example of a diproticacid.

Correct AnswerverifiedShow Answer

Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O →\rarr→ Cd(OH) 2 + Ni(OH) 2

Correct AnswerverifiedShow Answer

During a titration the following data were collected. A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200. mL of the base was required to neutralize the sample. How many grams of HCl are present in 500. mL of this acid solution

Correct AnswerverifiedShow Answer

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displacement, or disproportionation reaction. Ba(C2H3O2) 2(aq) + Na2CO3(aq) →\rarr→ BaCO3(s) + 2 NaC2H3O2(aq)

Correct AnswerverifiedShow Answer

If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution. What would the molarity of the resulting solution be

Correct AnswerverifiedShow Answer

What mass of C6H12O6 (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in water

Correct AnswerverifiedShow Answer

Determine the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula.

Correct AnswerverifiedShow Answer

Which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed

Correct AnswerverifiedShow Answer

Identify the major ionic species present in an aqueous solution of Na2CO3.

Correct AnswerverifiedShow Answer

Which of the following compounds is a strong electrolyte

Correct AnswerverifiedShow Answer

Hydrogen is oxidized in the following chemical reaction.H2 + Cl2 →\rarr→ 2HCl

Correct AnswerverifiedShow Answer

Which of the following compounds is a weak electrolyte

Correct AnswerverifiedShow Answer

Correct Answer
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In the following chemical reaction the oxidizing agent is 5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

Correct Answer
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Correct Answer
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Correct Answer
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Which represents the oxidation number of each of the elements in BaNaPO₄

Correct Answer
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Correct Answer
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K is element being oxidized in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

Correct Answer
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Correct Answer
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H₂CO₃ is an example of a diproticacid.

Correct Answer
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Identify the reducing agent in the following chemical reaction. Cd + NiO₂ + 2H₂O $\rarr$ Cd(OH) ₂ + Ni(OH) ₂

Correct Answer
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Correct Answer
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Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displacement, or disproportionation reaction. Ba(C₂H₃O₂) ₂(aq) + Na₂CO₃(aq) $\rarr$ BaCO₃(s) + 2 NaC₂H₃O₂(aq)

Correct Answer
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Correct Answer
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What mass of C₆H₁₂O₆ (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in water

Correct Answer
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Determine the correct oxidation numbers for all three elements in Rb₂SO₃ in the order that the elements are shown in the formula.

Correct Answer
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Which of the following will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed

Correct Answer
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Identify the major ionic species present in an aqueous solution of Na₂CO₃.

Correct Answer
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Correct Answer
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Hydrogen is oxidized in the following chemical reaction.H₂ + Cl₂ $\rarr$ 2HCl

Correct Answer
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Correct Answer
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