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Match the following definitions with the correct term

Chemistry

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Match the following definitions with the correct term. reduction d. redox b. oxidation e. oxidizing agent c.

a.

spectator ion

f.

reducing agent

 

 

____   1.  a loss of electrons

 

 

 

____   2.  a reaction where there is a loss and a gain of electrons

 

 

 

____   3.  the material that causes a loss of electrons

 

 

 

____   4.  the material that causes a gain of electrons

 

 

 

____   5.  a gain of electrons

 

 

 

____   6.  a material that does not lose or gain electrons

 

 

 

Match the following oxidation numbers for nitrogen to the correct compound or ion given:

a.

-3

b.

+2

c.

+3

d.

+4

e.

+5

 

 

____   7.  NH4+

 

 

 

____   8.  NO₂

 

 

 

____   9.  NO

 

 

 

____ 10.  NI₃

 

 

 

____ 11.  NO3-

 

 

 

For the reaction NO(g) + KMnO4(aq) --> MnO2(s)+KNO3(aq)

 

a.

permanganate

d.

nitrogen monoxide

b.

nitrogen

e.

potassium

c.

manganese

 

 

 

____ 12.  Which element is oxidized?

 

 

 

____ 13.  Which element is reduced?

 

 

 

____ 14.  What is the oxidizing agent?

 

 

 

____ 15.  What is the reducing agent?

 

 

 

____ 16.  Which ion is a spectator ion?

 

 

 

 

Part B (Acid-Base Reactions): Multiple Choice: ( 30 marks) each question is worth 2 marks. One mark for the strategy and one mark for the final answer.

Identify the choice that best completes the statement or answers the question. Your choices are given below the text box. Make sure you include your strategy.

 

 

____   1.  The spectator ion in the equation MgSO4(aq)+Cu(s)--> Mg(s)+MgSO4(aq) is

 

 

a. MgSO4 (aq)

b.Cu(s)

c. SO4^-2 (aq)

 

d. Mg(s)

e. CuSO4 (aq)

 

 

____   2.  Which is the correct net ionic equation for the following reaction : MgSO4(aq)+Cu(s)--> Mg(s)+MgSO4(aq)

 

 

a. Mg2+(aq)+Cu(s)-->Cu2+(aq)+Mg(s)

 

b. MgSO4(aq)+Cu(s)--> Mg(s)+CuSO4 (aq)

 

c. Mg2+ (aq) --> Cu2+ (aq)

 

d. Mg2+ (aq) +SO4^2- (aq) + Cu(s) --> Cu2+ (aq) + SO4^2- (aq) + Mg(s)

 

e. MgSO4 (aq) --> CuSO4(aq)

 

 

 

____   3.  Identify the oxidizing agent in the reaction: Sn2+ (aq) + Cl2(g) --> Sn4+ (aq) + 2Cl- (aq)

 

 

 

a. Sn2+ (aq)

     

b. Cl2(aq)

     

c. Sn2+ (aq)

    

d. Sn4+ (aq)

  

e. this is not a redox reaction

 

 

____   4.  Identify the reducing agent in the reaction: Sn2+ (aq) + Cl2(g) --> Sn4+ (aq) + 2Cl- (aq)

 

 

 

a. Cl2(g)

 

b. Sn2+(aq)

 

c. Sn4+ (aq)

 

d. Cl2(g)

 

e.

this is not a redox reaction

 

 

____   5.  Identify the spectator ion in the reaction: Zn(s) + SnSO4(aq) --> ZnSO4(aq) + Sn(s)

 

 

 

a. Zn(s)

b. Zn2+ (aq)

 

c. SO4^2- (aq)

 

d. Sn2+ (aq)

 

e. there is no spectator ion in this reaction

 

 

 

____   6.  In the reaction: Al(s)+O2(g)--> Al2O3(s), how many electrons does an atom of aluminum lose or gain?

 

 

a.

aluminum loses 1 electron

b.

aluminum gains 1 electron

c.

aluminum loses 3 electrons

d.

aluminum gains 3 electrons

e.

there is no loss or gain of electrons

 

 

____   7.  In the reaction: Al(s)+O2(g)--> Al2O3(s), how many electrons does an atom of oxygen lose or gain?

 

 

a.

oxygen loses 2 electrons

b.

oxygen gains 2 electrons

c.

oxygen loses 3 electrons

d.

oxygen gains 3 electrons

e.

there is no loss or gain of electrons

 

 

____   8.  In the reaction Al(s) + Ca(NO3)2 (aq) --> Al(NO3)3 (aq) + Ca(s)

which element loses electrons in the process?

 

 

a.

oxygen

b.

nitrogen

c.

calcium

d.

aluminum

e.

no element loses electrons

 

 

____   9.  In the reaction Al(s) + Ca(NO3)2 (aq) --> Al(NO3)3 (aq) + Ca(s)

which element gains electrons in the process?

 

 

 

 

a.

oxygen

b.

nitrogen

c.

calcium

d.

aluminum

e.

no element gains electrons

 

 

____ 10.  In the reaction Pb(NO3)2 (aq) + CaCl2 (aq) --> Ca(NO3)2 (aq) + PbCl2 (s)

which element gains electrons in the process?

 

 

a.

oxygen

b.

nitrogen

c.

calcium

d.

aluminum

e.

no element gains electrons

 

 

____ 11.  In the reaction Pb(NO3)2 (aq) + CaCl2 (aq) --> Ca(NO3)2 (aq) + PbCl2 (s)

which element loses electrons in the process?

 

 

a.

oxygen

b.

nitrogen

c.

calcium

d.

aluminum

e.

no element loses electrons

 

 

____ 12.  What must be added to the following half-reaction for it to be balanced?

 

Al3+(aq)--> Al(s)

 

a.

1 electron to the left side

b.

1 electron to the right side

c.

3 electrons to the left side

d.

3 electrons to the right side

e.

3 electrons to both sides

 

 

____ 13.  What must be added to the following half-reaction for it to be balanced?

 

Zn(s)--> Zn2+ (aq)

 

a.

2 electron to the left side

b.

2 electron to the right side

c.

3 electrons to the left side

d.

3 electrons to the right side

e.

2 electrons to both sides

 

 

____ 14.  How many water molecules must be added to the half reaction given below to balance the mass for oxygen atoms?

 

MnO4-(aq)--> MnO2(s)

 

a.

4 on the left side

b.

4 on the right side

c.

2 on the left side

d.

2 on the right side

e.

1 on the left side

 

 

____ 15.  How many electrons must be added to the half reaction given below to balance the charge after the mass has been balanced?

MnO4-(aq)--> MnO2(s)

 

a.

4 on the left side

b.

4 on the right side

c.

3 on the left side

d.

3 on the right side

e.

1 on the right side

 

 

Part C ( Putting the Concepts to Work): Completion (21 marks): Using your reading, answer the following questions. Give your answer as well as your strategy for determining your answer. As part of your answer, give the page number (or website) that you used to find the answer the question. 

 

 

           1.  (four marks) Fully explain why the following reaction will not occur.

Sn2+(aq)+Pb4+ (aq) --> Sn(s)+Pb2+(aq)

 

 

 

           2.  (eight marks) In a reaction of magnesium and nickel (II) ions, solid nickel and aqueous magnesium ions form.

a) Write and balance the redox reaction described here

b) Identify what is being oxidized and what is being reduced

c) Identify the oxidizing agent and the reducing agent

d) How many electrons are being transferred in this process?

 

 

 

           3.  (eight marks) For the reactions given below, write the reaction, the balanced net ionic equation and track electrons lost and gained in the process

a) solid cobalt reacts with copper (II) sulfate to form solid copper and cobalt (II) sulfate

b) solid chromium reacts with iron (II) nitrate to form solid iron and chromium (III) nitrate