Question 1

A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

Accepted Answer

A)  3.70 * 10-2 M
B)  1.05 * 10-2 M
C)  6.57 * 10-2 M
D)  4.93 * 10-2 M
E)  0.131 MF) B) and D)
G) C) and D)

Question 2

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

Accepted Answer

The answer of If 145 grams of potassium nitrate were...

Question 3

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.
Rank the metals from most active to least active.

Accepted Answer

most active Zn, next...

Question 4

Which of the following is an example of a disproportionation reaction?

Accepted Answer

A)  2C2H6(g) + 7O2(g)  →\rarr→ 4CO2(g) + 6H2O(l) 
B)  2KBr(aq) + Cl2(g)  →\rarr→ 2KCl(aq) + Br2(l) 
C)  2H2O2(aq)  →\rarr→  2H2O(l) + O2(g) 
D)  CaBr2(aq) + H2SO4(aq)  →\rarr→ CaSO4(s) + 2HBr(g) 
E)  2Al(s) + 3H2SO4(aq)  →\rarr→ Al2(SO4) 3(aq) + 3H2(g)  F) A) and E)
G) B) and E)

Question 5

The oxidation number of Cl in ClO4-  is

Accepted Answer

A)  -1.
B)  +1.
C)  +3.
D)  +5.
E)  None of the above.F) None of the above
G) C) and E)

Question 6

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 F) B) and C)
G) A) and B)

Question 7

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na2SO4.

Accepted Answer

Question 8

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO3) 2(aq) is mixed with a solution containing 0.1 g of KI(aq) /100 mL?

Accepted Answer

A)  KNO3 will precipitate; Pb2+ and I- are spectator ions.
B)  No precipitate will form.
C)  Pb(NO3) 2 will precipitate; K+ and I- are spectator ions.
D)  PbI2 will precipitate; K+ and NO3- are spectator ions.
E)  Pb2+ and I- are spectator ions, and PbI2 will precipitate.F) All of the above
G) A) and B) D

Question 9

Determine the oxidation number of each of the elements in K2TaF7?

Accepted Answer

the oxidation number of K is +1; the oxidation number of Ta is +5; the oxidation number of F is -1

Question 10

Name and give the formulas for six strong acids.

Accepted Answer

hydrochloric acid, HCl; hydrob...

Question 11

What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?

Accepted Answer

A)  3.11 g
B)  24.9 g
C)  12.4 g
D)  6.21 g
E)  8.88 gF) C) and E)
G) B) and D)

Question 12

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Accepted Answer

(Answers will vary.)An electrolyte is a ...

Question 13

The oxidation number of Mn in KMnO4 is

Accepted Answer

A)  +8.
B)  +7.
C)  +5.
D)  -7.
E)  -8.F) B) and E)
G) B) and C)

Question 14

The distinguishing characteristic of all electrolyte solutions is that they

Accepted Answer

A)  contain molecules.
B)  conduct electricity.
C)  react with other solutions.
D)  always contain acids.
E)  conduct heat.F) B) and D)
G) A) and D)

Question 15

What mass of Li3PO4 is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?

Accepted Answer

A)  6.75 g
B)  10.1 g
C)  19.3 g
D)  30.4 g
E)  3.38 gF) D) and E)
G) A) and C) E

Question 16

Give an example of a diprotic acid.

Accepted Answer

The answer of Give an example of a diprotic acid....

Question 17

The following equation is an example of a net ionic equation.
Na+(aq)+ Br-(aq)+ Ag+(aq)+ NO3-(aq)$\rarr$ AgBr(s)+ Na+(aq)+ NO3-(aq)

Accepted Answer

A) True 
 B)False

Question 18

What is the molar concentration of chloride ions in a solution prepared by mixing 100. mL of 2.0 M KCl with 50. mL of a 1.5 M CaCl2 solution?

Accepted Answer

Question 19

Which of the following represents a precipitation reaction?

Accepted Answer

A)  2H2(g) + O2(g)  →\rarr→ 2H2O(l) 
B)  CaBr2(aq) + H2SO4(aq)  →\rarr→  CaSO4(s) + 2HBr(g) 
C)  2KNO3(s)  →\rarr→ 2KNO2(s) + O2(g) 
D)  2KBr(aq) + Cl2(g)  →\rarr→  2KCl(aq) + Br2(l) 
E)  2Al(s) + 3H2SO4(aq)  →\rarr→ Al2(SO4) 3(aq) + 3H2(g)  F) D) and E)
G) B) and D)

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)  KOHF) D) and E)
G) B) and C)

Exam 4: Reactions in Aqueous Solution

A 4.691 g sample of MgCl₂ is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
most active Zn, next...
View Answer

Which of the following is an example of a disproportionation reaction?

Correct Answer
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The oxidation number of Cl in ClO₄^- is

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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Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na₂SO₄.

Correct Answer
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Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO₃) ₂(aq) is mixed with a solution containing 0.1 g of KI(aq) /100 mL?

Correct Answer
verified
D

Determine the oxidation number of each of the elements in K₂TaF₇?

Correct Answer
verified
the oxidation number of K is +1; the oxidation number of Ta is +5; the oxidation number of F is -1

Name and give the formulas for six strong acids.

Correct Answer
verified
hydrochloric acid, HCl; hydrob...
View Answer

What mass of Na₂SO₄ is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?

Correct Answer
verified

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Correct Answer
verified
(Answers will vary.)An electrolyte is a ...
View Answer

The oxidation number of Mn in KMnO₄ is

Correct Answer
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The distinguishing characteristic of all electrolyte solutions is that they

Correct Answer
verified

What mass of Li₃PO₄ is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?

Correct Answer
verified
E

Give an example of a diprotic acid.

Correct Answer
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The following equation is an example of a net ionic equation. Na⁺(aq)+ Br^-(aq)+ Ag⁺(aq)+ NO₃^-(aq) $\rarr$ AgBr(s)+ Na⁺(aq)+ NO₃^-(aq)

Correct Answer
verified

What is the molar concentration of chloride ions in a solution prepared by mixing 100. mL of 2.0 M KCl with 50. mL of a 1.5 M CaCl₂ solution?

Correct Answer
verified

Which of the following represents a precipitation reaction?

Correct Answer
verified

Which of the following compounds is a strong electrolyte?

Correct Answer
verified

Exam 4: Reactions in Aqueous Solution

A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answerverifiedmost active Zn, next...View AnswerShow Answer

Which of the following is an example of a disproportionation reaction?

Correct AnswerverifiedShow Answer

The oxidation number of Cl in ClO4- is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na2SO4.

Correct AnswerverifiedShow Answer

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO3) 2(aq) is mixed with a solution containing 0.1 g of KI(aq) /100 mL?

Correct AnswerverifiedD

Determine the oxidation number of each of the elements in K2TaF7?

Correct Answerverifiedthe oxidation number of K is +1; the oxidation number of Ta is +5; the oxidation number of F is -1

Name and give the formulas for six strong acids.

Correct Answerverifiedhydrochloric acid, HCl; hydrob...View AnswerShow Answer

What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?

Correct AnswerverifiedShow Answer

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Correct Answerverified(Answers will vary.)An electrolyte is a ...View AnswerShow Answer

The oxidation number of Mn in KMnO4 is

Correct AnswerverifiedShow Answer

The distinguishing characteristic of all electrolyte solutions is that they

Correct AnswerverifiedShow Answer

What mass of Li3PO4 is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?

Correct AnswerverifiedE

Give an example of a diprotic acid.

Correct AnswerverifiedShow Answer

The following equation is an example of a net ionic equation. Na+(aq)+ Br-(aq)+ Ag+(aq)+ NO3-(aq) →\rarr→ AgBr(s)+ Na+(aq)+ NO3-(aq)

Correct AnswerverifiedShow Answer

What is the molar concentration of chloride ions in a solution prepared by mixing 100. mL of 2.0 M KCl with 50. mL of a 1.5 M CaCl2 solution?

Correct AnswerverifiedShow Answer

Which of the following represents a precipitation reaction?

Correct AnswerverifiedShow Answer

Which of the following compounds is a strong electrolyte?

Correct AnswerverifiedShow Answer

A 4.691 g sample of MgCl₂ is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
most active Zn, next...
View Answer

Correct Answer
verified

The oxidation number of Cl in ClO₄^- is

Correct Answer
verified

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

Correct Answer
verified

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na₂SO₄.

Correct Answer
verified

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO₃) ₂(aq) is mixed with a solution containing 0.1 g of KI(aq) /100 mL?

Correct Answer
verified
D

Determine the oxidation number of each of the elements in K₂TaF₇?

Correct Answer
verified
the oxidation number of K is +1; the oxidation number of Ta is +5; the oxidation number of F is -1

Correct Answer
verified
hydrochloric acid, HCl; hydrob...
View Answer

What mass of Na₂SO₄ is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?

Correct Answer
verified

Correct Answer
verified
(Answers will vary.)An electrolyte is a ...
View Answer

The oxidation number of Mn in KMnO₄ is

Correct Answer
verified

Correct Answer
verified

What mass of Li₃PO₄ is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?

Correct Answer
verified
E

Correct Answer
verified

The following equation is an example of a net ionic equation. Na⁺(aq)+ Br^-(aq)+ Ag⁺(aq)+ NO₃^-(aq) $\rarr$ AgBr(s)+ Na⁺(aq)+ NO₃^-(aq)

Correct Answer
verified

What is the molar concentration of chloride ions in a solution prepared by mixing 100. mL of 2.0 M KCl with 50. mL of a 1.5 M CaCl₂ solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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