Hello, I would appreciate if someone were to help me answer the following questi

Question

Hello, I would appreciate if someone were to help me answer the following questions. Any help would be much appreciated. Thank you!

1.

2I+Cl2I2+2Cl

Which substance is oxidized?

Which substance is reduced?

2.

Oxidation half-reaction for 2Al(s)+6H+(aq)2Al3+(aq)+3H2(g)

Reduction half-reaction for 2Al(s)+6H+(aq)2Al3+(aq)+3H2(g)

Oxidation half-reaction for 2Cu+(aq)+Mg(s)Mg2+(aq)+2Cu(s)

Reduction half-reaction for 2Cu+(aq)+Mg(s)Mg2+(aq)+2Cu(s)

3.

Oxidized or Reduced?

Zinc

Water

Iron

Copper

4.

Which of the following increases or decreases the corrosion rate?

Electroplaying the metal surface

Painting the metal surface

Putting strain on the metal

Coating the metals with varnish or grease

Exposing the metal to an electrolyte

Placing the metal objcect in a moist room

5.

Which of these occur at anode vs. at cathode during the rusting of iron?

Oxygen gains electrons

Iron loses electrons

OH- is formed

Fe2+ is formed

6.

What is the main active ingredient in common household bleach, also known as chlorine bleach?

a. Ca(OCI)2

b. H2O2

c. HOCl

d. NaOCl

7.

Oxidation or reduction?

Sn2+ ------> Sn4+ + 2e-

Bi3+ + 3e- -----> Bi

Zn -----> Zn2+ + 2e-

H+ + e- ------> H

8.

Combine the following two reactions to obtain a balanced overall redox reaction.

Sn2+ Sn4++2e  and  Bi3++3e Bi

Zn Zn2++2e  and  H++e H

9.

Which of the following statements about freeing metals from their ores is true?

a. Other metals cannot be used to remove a metal from its ore.

b. Vitamin C removes metal from its ore by inhibiting air oxidation.

c. Hydrogen cannot be used to remove metal from its ore because it is an oxidizing agent.

d. Coke or coal can be used to remove a metal from its ore.

Thanks in advance!

Explanation / Answer

1. Iodine is getting oxidized from -1 to 0

Cl is getting reduced from 0 to -1

2. and 3. not clear

4. The following actions would increase the corrosion,

- putting strain on metal

- exposing the metal to an electrolyte

- placing the metal object in amoist room

the following actons would decrease corrosion,

- electroplating of metal surface

- painting the metal surface

- coating the metal with varnish or grease

5. During corrosion the following occurs at anode,

- Iron looses electron

- Fe2+ is formed

At cathode the following happens,

- Oxygen gains electron

- OH- is formed

6. The main active ingredient of common husehold bleach is,

d. NaOCl

7. classification of reactions,

the following are oxidation reactions,

Sn2+ ---> Sn4+ + 2e-

Zn --> Zn2+ + 2e-

the following are reduction reactions,

Bi3+ + 3e- --> Bi

H+ + e- --> H

8. The combination of the following and balanced equation thus would be,

3Sn2+ + 2Bi3+ ---> 3Sn4+ + 2Bi

Zn + 2H+ ---> Zn2+ + H2

9. Of the follwoing statements the truw statement would be,

d. Coke or coal can be used to remove a metal from its ore.

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