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Oxidation and Reduction Chapter 20

Authored by Charles Martinez

Chemistry

11th - 12th Grade

NGSS covered

Oxidation and Reduction Chapter 20
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25 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Refer to the structures of the four ions shown, which are dichromate (Cr2O72-), permanganate (MnO4-), thiosulfate (S2O32-), and triiodide (I3-) ions.

Which structure best represents the permanganate ion?

A

B

C

D

Tags

NGSS.HS-PS1-3

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Refer to the structures of the four ions shown, which are dichromate (Cr2O72-), permanganate (MnO4-), thiosulfate (S2O32-), and triiodide (I3-) ions.

Which structure best represents the dichromate ion?

A

B

C

D

Tags

NGSS.HS-PS1-3

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Answer the following questions using the unbalanced half-reaction:

Cr2O72- + H+ --> Cr3+ + H2O

What is the oxidation number of Cr in Cr2O72-?

-2

+3

+5

+6

Tags

NGSS.HS-PS1-2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Answer the following questions using the unbalanced half-reaction:

Cr2O72- + H+ --> Cr3+ + H2O

How many H+ ions are in the balanced half reaction?

5

8

12

14

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Answer the following questions using the unbalanced half-reaction:

Cr2O72- + H+ --> Cr3+ + H2O

How many electrons are needed (and on which side of the half-reaction) to balance the electron transfer?

4 on the right

8 on the right

3 on the left

6 on the left

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which equation represents an oxidation-reduction reaction?

2 HCl(aq) + Na2CO3(s) --> 2 NaCl(aq) + CO2(g) + H2O(l)

2 HCl(aq) + Zn(s) --> H2(g) + ZnCl2(aq)

HCl(aq) + AgNO3(aq) --> AgCl(s) + HNO3(aq)

HCl(aq) + NH3(g) --> NH4Cl(s)

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is the net ionic equation for the nitric acid oxidation of iron(II) chloride to form iron(III) chloride and nitrogen(II) oxide?

3 FeCl2 + 4 HNO3 --> 2 FeCl3 + Fe(NO3)3 + N + 2 H2O

3 Fe2+ + 6 Cl + 4 NO3- + 4 H+ --> 3 Fe3+ + 6Cl + 3NO3- + NO + 2 H2O

3 Fe2+ + NO3- + 4 H+--> 3 Fe3+ + NO + 2 H2O

3 Fe2+ + NO3- + 6 H+--> 3 Fe3+ + N2+ + 3 H2O

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

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