Question 1

What is the typical net ionic equation for an acid-base neutralization of KOH and HCl?

Accepted Answer

A) HCl(aq)+ KOH(aq)→ H2O(l)+ KCl(aq) 
B) KOH(aq)→ K+(aq)+ OH-(aq) 
C) H2O(l)→ H+(aq)+ OH-(aq) 
D) K+(aq)+ OH-(aq)→ KOH(aq) 
E) H+(aq)+ OH-(aq)→ H2O(l)

Question 2

The reaction 2 AgNO3(aq)+ K2SO4(aq)→ 2 KNO3(aq)+ Ag2SO4(s)is an example of a(an)________ reaction.

Accepted Answer

A) acid-base 
B) oxidation-reduction 
C) precipitation 
D) combustion 
E) none of the above

Question 3

2 AgNO3(aq) + K2SO4 (aq) → 2 KNO3 (aq) + Ag2SO4(s)
The net ionic reaction for the balanced equation shown above is

Accepted Answer

A)  Ag+(aq)+ NO3-(aq)→ AgNO3(s) 
B) 2 K+(aq)+ SO42-(aq)→ K2SO4(aq) 
C) K+(aq)+ NO3-(aq)→ KNO3(aq) 
D) 2 Ag+(aq)+ SO42-(aq)→ Ag2SO4(s) 
E) H+(aq)+ OH-(aq)→ H2O(l)

Question 4

In a typical oxidation-reduction reaction the electrons are transferred

Accepted Answer

A) from the oxidizing agent to the reducing agent. 
B) from what is being oxidized to the substance being reduced. 
C) from what is being reduced to the substance being oxidized. 
D) from what is being oxidized to the reducing agent. 
E) none of these.

Question 5

2 AgNO3(aq)+ K2SO4(aq)→ 2 KNO3(aq)+ Ag2SO4(s)
The spectator ions in the reaction shown are

Accepted Answer

A) silver ion and nitrate ion. 
B) potassium ion and sulfate ion. 
C) potassium ion and nitrate ion. 
D) silver ion and sulfate ion. 
E) hydrogen ion and hydroxide ion.

Question 6

When the reaction shown is correctly balanced,the coefficients are:
________ HNO3 + ________ KOH → ________ KNO3 + ________ H2O

Accepted Answer

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

Question 7

Match the following.
-M(s)+ 2 LX(aq)→ 2 L(s)+ M (aq)

Accepted Answer

A) redox 
B) acid-base 
C) precipitation

Question 8

The formation of which one of the compounds below will act as the driving force for an acid-base reaction?

Accepted Answer

A) H2O 
B) MgCl2 
C) NaNO3 
D) KOH 
E) all of these

Question 9

In a precipitation reaction the insoluble product can be identified by the symbol

Accepted Answer

A) (aq). 
B) (l). 
C) (g). 
D) (s). 
E) none of the above

Question 10

The combination of ions least likely to produce a precipitate is

Accepted Answer

A) Ba2+ and SO42-. 
B) Pb+ and Cl-. 
C) Ca2+ and PO43-. 
D) Fe3+ and OH-. 
E) Mg2+ and C2H3O2-.

Question 11

When the reaction shown is correctly balanced,the coefficients are:
________ Li + ________ Br2 → ________ LiBr

Accepted Answer

A) 1;1;1 
B) 1;2;2 
C) 1;2;1 
D) 2;2;1 
E) 2;1;2

Question 12

Reduction is the process of

Accepted Answer

A) gaining hydrogen. 
B) losing oxygen. 
C) gaining electrons. 
D) forming an anion from a neutral atom. 
E) all of the above

Question 13

Which reaction is not an example of a redox reaction?

Accepted Answer

A) 2 Hg(l)+ O2(g)→ 2 HgO(s) 
B) 2 (NH4)3PO4(aq)+ 3 Ba(NO3)2(aq)→ Ba3(PO4)2(s)+ 6 NH4NO3(aq) 
C) CH4(g)+ 2 O2(g)→ CO2(g)+ 2 H2O(g) 
D) 6 HCl(aq)+ 2 Al(s)→ 2 AlCl3(aq)+ 3 H2(g) 
E) 2 Al2O3(s)→ 4 Al(s)+ 3 O(g)

Question 14

As a pure element the oxidation number of zinc is ________,but in compounds such as ZnCO3 its oxidation number is ________.

Accepted Answer

A) 0;0 
B) 0;+1 
C) +1;0 
D) 0;+2 
E) none of the above

Question 15

When a substance loses electrons it is ________;the substance itself is acting as a(an)________ agent.

Accepted Answer

A) oxidized;oxidizing 
B) oxidized;reducing 
C) reduced;oxidizing 
D) reduced;reducing 
E) dissolved;neutralizing

Question 16

Consider the reaction shown and identify the statement that is not true.
CaCO3(s) CaO(s)+ CO2(g)

Accepted Answer

A) This reaction is balanced as written. 
B) The reactant must be heated for this reaction to occur. 
C) The products are a solid and a gas. 
D) Water must be present for this reaction to occur. 
E) There are no solutions used in this reaction.

Question 17

Which statement regarding balanced chemical equations is not true?

Accepted Answer

A) The number of each kind of atom must be the same on each side. 
B) Coefficients are used in front of formulas to balance the equation. 
C) Subscripts may be changed to make an equation simpler to balance. 
D) When no coefficient is written in front of a formula,the number "one" is assumed. 
E) Reactants are written to the left of the arrow.

Question 18

In which of the following is the oxidation number for oxygen equal to zero?

Accepted Answer

A) Ca(OH)2 
B) HNO3 
C) O2 
D) H2O2 
E) all of the above

Question 19

What are the spectator ions in the reaction between KOH and HNO3?

Accepted Answer

A) K+ and H+ 
B) H+ and OH- 
C) K+ and NO3- 
D)  H+and NO3- 
E) none of these

Question 20

When a solution of iron(III)nitrate is mixed with a solution of sodium hydroxide,a rust colored precipitate forms.This precipitate is probably

Accepted Answer

A) iron(III)nitrate. 
B) sodium hydroxide. 
C) sodium nitrate. 
D) iron(III)hydroxide. 
E) none of the above

Exam 5: Classification and Balancing of Chemical Reactions

What is the typical net ionic equation for an acid-base neutralization of KOH and HCl?

The reaction 2 AgNO₃(aq) + K₂SO₄(aq) → 2 KNO₃(aq) + Ag₂SO₄(s) is an example of a(an) ________ reaction.

2 AgNO₃(aq) + K₂SO₄ (aq) → 2 KNO₃ (aq) + Ag₂SO₄(s) The net ionic reaction for the balanced equation shown above is

In a typical oxidation-reduction reaction the electrons are transferred

2 AgNO₃(aq) + K₂SO₄(aq) → 2 KNO₃(aq) + Ag₂SO₄(s) The spectator ions in the reaction shown are

When the reaction shown is correctly balanced,the coefficients are: HNO₃ + KOH → KNO₃ + H₂O

Match the following. -M(s) + 2 LX(aq) → 2 L(s) + M (aq)

The formation of which one of the compounds below will act as the driving force for an acid-base reaction?

In a precipitation reaction the insoluble product can be identified by the symbol

The combination of ions least likely to produce a precipitate is

When the reaction shown is correctly balanced,the coefficients are: Li + Br₂ → LiBr

Reduction is the process of

Which reaction is not an example of a redox reaction?

As a pure element the oxidation number of zinc is ,but in compounds such as ZnCO₃ its oxidation number is .

When a substance loses electrons it is ;the substance itself is acting as a(an) agent.

Consider the reaction shown and identify the statement that is not true. CaCO₃(s) CaO(s) + CO₂(g)

Which statement regarding balanced chemical equations is not true?

In which of the following is the oxidation number for oxygen equal to zero?

What are the spectator ions in the reaction between KOH and HNO₃?

When a solution of iron(III) nitrate is mixed with a solution of sodium hydroxide,a rust colored precipitate forms.This precipitate is probably

Exam 5: Classification and Balancing of Chemical Reactions

What is the typical net ionic equation for an acid-base neutralization of KOH and HCl?

The reaction 2 AgNO3(aq) + K2SO4(aq) → 2 KNO3(aq) + Ag2SO4(s) is an example of a(an) ________ reaction.

2 AgNO3(aq) + K2SO4 (aq) → 2 KNO3 (aq) + Ag2SO4(s) The net ionic reaction for the balanced equation shown above is

In a typical oxidation-reduction reaction the electrons are transferred

2 AgNO3(aq) + K2SO4(aq) → 2 KNO3(aq) + Ag2SO4(s) The spectator ions in the reaction shown are

When the reaction shown is correctly balanced,the coefficients are: ________ HNO3 + ________ KOH → ________ KNO3 + ________ H2O

Match the following. -M(s) + 2 LX(aq) → 2 L(s) + M (aq)

The formation of which one of the compounds below will act as the driving force for an acid-base reaction?

In a precipitation reaction the insoluble product can be identified by the symbol

The combination of ions least likely to produce a precipitate is

When the reaction shown is correctly balanced,the coefficients are: ________ Li + ________ Br2 → ________ LiBr

Reduction is the process of

Which reaction is not an example of a redox reaction?

As a pure element the oxidation number of zinc is ________,but in compounds such as ZnCO3 its oxidation number is ________.

When a substance loses electrons it is ________;the substance itself is acting as a(an) ________ agent.

Consider the reaction shown and identify the statement that is not true. CaCO3(s) CaO(s) + CO2(g)

Which statement regarding balanced chemical equations is not true?

In which of the following is the oxidation number for oxygen equal to zero?

What are the spectator ions in the reaction between KOH and HNO3?

When a solution of iron(III) nitrate is mixed with a solution of sodium hydroxide,a rust colored precipitate forms.This precipitate is probably

The reaction 2 AgNO₃(aq) + K₂SO₄(aq) → 2 KNO₃(aq) + Ag₂SO₄(s) is an example of a(an) ________ reaction.

2 AgNO₃(aq) + K₂SO₄ (aq) → 2 KNO₃ (aq) + Ag₂SO₄(s) The net ionic reaction for the balanced equation shown above is

2 AgNO₃(aq) + K₂SO₄(aq) → 2 KNO₃(aq) + Ag₂SO₄(s) The spectator ions in the reaction shown are

When the reaction shown is correctly balanced,the coefficients are: HNO₃ + KOH → KNO₃ + H₂O

When the reaction shown is correctly balanced,the coefficients are: Li + Br₂ → LiBr

As a pure element the oxidation number of zinc is ,but in compounds such as ZnCO₃ its oxidation number is .

When a substance loses electrons it is ;the substance itself is acting as a(an) agent.

Consider the reaction shown and identify the statement that is not true. CaCO₃(s) CaO(s) + CO₂(g)

What are the spectator ions in the reaction between KOH and HNO₃?