Question 1

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of:

Accepted Answer

A) iron(III)chloride. 
B) potassium chloride. 
C) magnesium chloride. 
D) barium chloride. 
E) none of the above 
A) iron(III)chloride. 
B) potassium chloride. 
C) magnesium chloride. 
D) barium chloride. 
E) none of the above

Question 2

A redox reaction has occurred ________.

Accepted Answer

A) when a substance reacts with elemental oxygen 
B) when an alkali metal reacts with an alkaline earth metal 
C) when one substance transfers protons to another 
D) when one substance forms a solid 
E) when all of the above occur 
A) when a substance reacts with elemental oxygen 
B) when an alkali metal reacts with an alkaline earth metal 
C) when one substance transfers protons to another 
D) when one substance forms a solid 
E) when all of the above occur

Question 3

The mixing of sodium metal and chlorine gas would be the type of reaction known as:

Accepted Answer

A) oxidation-reduction 
B) gas evolution 
C) neutralization 
D) precipitation 
E) none of the above 
A) oxidation-reduction 
B) gas evolution 
C) neutralization 
D) precipitation 
E) none of the above

Question 4

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas.Which equation below best describes the balanced equation for this reaction?

Accepted Answer

A) Na + H2O → NaOH (aq)+ H (g) 
B) S + H2O → SOH (aq)+ H (g) 
C) Na + H2O → NaOH (aq)+ H2 (g) 
D) 2Na + 2H2O → 2NaOH (aq)+ H2 (g) 
E) 2Na + H2O → Na2OH (aq)+ H (g) 
A) Na + H2O → NaOH (aq)+ H (g) 
B) S + H2O → SOH (aq)+ H (g) 
C) Na + H2O → NaOH (aq)+ H2 (g) 
D) 2Na + 2H2O → 2NaOH (aq)+ H2 (g) 
E) 2Na + H2O → Na2OH (aq)+ H (g)

Question 5

What type of reaction is the generic equation   ?

Accepted Answer

A) synthesis/combination 
B) decomposition 
C) single displacement 
D) double-displacement 
E) none of the above 
A) synthesis/combination 
B) decomposition 
C) single displacement 
D) double-displacement 
E) none of the above

Question 6

The following reaction IS balanced: BaCl2 + H2SO4 → 2HCl + BaSO4

Accepted Answer

A) True 
 B)False

Question 7

The formation of a new solid or gas is evidence of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 8

An aqueous solution is a homogeneous mixture of a substance with water and should be designated with the (l)abbreviation.

Accepted Answer

A) True 
 B)False

Question 9

An acid-base reaction always produces a salt plus carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following everyday substances does NOT typically contain an acid?

Accepted Answer

A) lemons 
B) vinegar 
C) soap 
D) limes 
E) all of the above 
A) lemons 
B) vinegar 
C) soap 
D) limes 
E) all of the above

Question 11

When the equation,___O2 + ___C6 H14 → ___CO2 + ___H2O is balanced,the coefficient of O2 is:

Accepted Answer

A) 3 
B) 10 
C) 19 
D) 38 
E) none of the above 
A) 3 
B) 10 
C) 19 
D) 38 
E) none of the above

Question 12

A reaction which forms a gaseous product is an example of a(n)________.

Accepted Answer

A) oxidation-reduction reaction 
B) combustion reaction 
C) precipitation reaction 
D) gas evolution reaction 
E) none of the above 
A) oxidation-reduction reaction 
B) combustion reaction 
C) precipitation reaction 
D) gas evolution reaction 
E) none of the above

Question 13

What are the coefficients for the following reaction when it is properly balanced? ___nitrogen monoxide + ___carbon monoxide → ___nitrogen +___carbon dioxide

Accepted Answer

A) 2,1,1,2 
B) 2,2,1,2 
C) 2,2,2,1 
D) 1,1,2,2 
E) none of the above 
A) 2,1,1,2 
B) 2,2,1,2 
C) 2,2,2,1 
D) 1,1,2,2 
E) none of the above

Question 14

What type of a reaction occurs when potassium metal reacts with fluorine gas?

Accepted Answer

A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction 
A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction

Question 15

What must be supplied for a decomposition reaction to happen?

Accepted Answer

A) energy 
B) heat 
C) electrical current 
D) light 
E) any of the above 
A) energy 
B) heat 
C) electrical current 
D) light 
E) any of the above

Question 16

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

Accepted Answer

A) A molecular equation is a chemical equation showing the complete,neutral formulas for every compound in a reaction. 
B) A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. 
C) A net ionic equation is an equation showing only the species that actually participate in the reaction. 
D) A spectator ion remains unchanged in the reaction and appears on both sides of the equation. 
E) All of the statements are true. 
A) A molecular equation is a chemical equation showing the complete,neutral formulas for every compound in a reaction. 
B) A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. 
C) A net ionic equation is an equation showing only the species that actually participate in the reaction. 
D) A spectator ion remains unchanged in the reaction and appears on both sides of the equation. 
E) All of the statements are true.

Question 17

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

Accepted Answer

A) H2O (l) 
B) SO2 (g) 
C) NaCl (aq) 
D) H2 (g) 
E) none of the above 
A) H2O (l) 
B) SO2 (g) 
C) NaCl (aq) 
D) H2 (g) 
E) none of the above

Question 18

What are the coefficients for the following reaction when it is properly balanced? ___O2 + ___CH4 → ___CO2 + ___H2O

Accepted Answer

A) 2,1,3,1 
B) 2,3,2,2 
C) 1,3,2,1 
D) 2,1,1,2 
E) none of the above 
A) 2,1,3,1 
B) 2,3,2,2 
C) 1,3,2,1 
D) 2,1,1,2 
E) none of the above

Question 19

Li+,Na+,K+ and NH4+ compounds are soluble.

Accepted Answer

A) True 
 B)False

Question 20

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq)+ K2CO3(aq)→ H2O(l)+ CO2(g)+ 2KCl(aq)
2.CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(l)
3.2HCl(aq)+ K2S(aq)→ H2S(g)+ 2KCl(aq)

Accepted Answer

A) 1 and 2 only 
B) 1 and 3 only 
C) 2 and 3 only 
D) All of 1,2,and 3 
E) None of 1,2,and 3 
A) 1 and 2 only 
B) 1 and 3 only 
C) 2 and 3 only 
D) All of 1,2,and 3 
E) None of 1,2,and 3

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of:

A redox reaction has occurred ________.

The mixing of sodium metal and chlorine gas would be the type of reaction known as:

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas.Which equation below best describes the balanced equation for this reaction?

What type of reaction is the generic equation ?

The following reaction IS balanced: BaCl₂ + H₂SO₄→ 2HCl + BaSO₄

The formation of a new solid or gas is evidence of a chemical reaction.

An aqueous solution is a homogeneous mixture of a substance with water and should be designated with the (l)abbreviation.

An acid-base reaction always produces a salt plus carbon dioxide.

Which of the following everyday substances does NOT typically contain an acid?

When the equation,_O₂ + _C₆ H₁₄ → _CO₂ + _H₂O is balanced,the coefficient of O₂ is:

A reaction which forms a gaseous product is an example of a(n)________.

What are the coefficients for the following reaction when it is properly balanced? _nitrogen monoxide + _carbon monoxide → _nitrogen +_carbon dioxide

What type of a reaction occurs when potassium metal reacts with fluorine gas?

What must be supplied for a decomposition reaction to happen?

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

What are the coefficients for the following reaction when it is properly balanced? _O₂ + _CH₄→ _CO₂ + _H₂O

Li⁺,Na⁺,K⁺ and NH₄⁺ compounds are soluble.

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq)+ K₂CO₃(aq)→ H₂O(l)+ CO₂(g)+ 2KCl(aq) 2.CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(l) 3.2HCl(aq)+ K₂S(aq)→ H₂S(g)+ 2KCl(aq)

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Atoms and Elements

Molecules and Compounds

Chemical Composition

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

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Solutions

Acids and Bases

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Exam 7: Chemical Reactions

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of:

A redox reaction has occurred ________.

The mixing of sodium metal and chlorine gas would be the type of reaction known as:

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas.Which equation below best describes the balanced equation for this reaction?

What type of reaction is the generic equation ?

The following reaction IS balanced: BaCl2 + H2SO4 → 2HCl + BaSO4

The formation of a new solid or gas is evidence of a chemical reaction.

An aqueous solution is a homogeneous mixture of a substance with water and should be designated with the (l)abbreviation.

An acid-base reaction always produces a salt plus carbon dioxide.

Which of the following everyday substances does NOT typically contain an acid?

When the equation,___O2 + ___C6 H14 → ___CO2 + ___H2O is balanced,the coefficient of O2 is:

A reaction which forms a gaseous product is an example of a(n)________.

What are the coefficients for the following reaction when it is properly balanced? ___nitrogen monoxide + ___carbon monoxide → ___nitrogen +___carbon dioxide

What type of a reaction occurs when potassium metal reacts with fluorine gas?

What must be supplied for a decomposition reaction to happen?

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

What are the coefficients for the following reaction when it is properly balanced? ___O2 + ___CH4 → ___CO2 + ___H2O

Li+,Na+,K+ and NH4+ compounds are soluble.

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq)+ K2CO3(aq)→ H2O(l)+ CO2(g)+ 2KCl(aq) 2.CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(l) 3.2HCl(aq)+ K2S(aq)→ H2S(g)+ 2KCl(aq)

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

The following reaction IS balanced: BaCl₂ + H₂SO₄→ 2HCl + BaSO₄

When the equation,_O₂ + _C₆ H₁₄ → _CO₂ + _H₂O is balanced,the coefficient of O₂ is:

What are the coefficients for the following reaction when it is properly balanced? _nitrogen monoxide + _carbon monoxide → _nitrogen +_carbon dioxide

What are the coefficients for the following reaction when it is properly balanced? _O₂ + _CH₄→ _CO₂ + _H₂O

Li⁺,Na⁺,K⁺ and NH₄⁺ compounds are soluble.

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq)+ K₂CO₃(aq)→ H₂O(l)+ CO₂(g)+ 2KCl(aq) 2.CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(l) 3.2HCl(aq)+ K₂S(aq)→ H₂S(g)+ 2KCl(aq)