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Balancing Redox Reactions

Authored by Lola Light

Chemistry

9th - 12th Grade

Used 18+ times

Balancing Redox Reactions
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What coefficient would Fe+2 have in the following reaction?
___ Al + ___ Fe+2 → ___ Al+3 + ___ Fe

1
2
3
6

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which of the following reactions is balanced by both mass and charge?

Fe+2 + Al →Fe + Al+3
Cu + Fe+2 → Cu+1 + Fe+3
F2 + Br- --> F- + Br2
Fe+2 + 2 Cu --> 2 Cu+ + Fe

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is the balanced half -reaction for the oxidation of Cu to Cu+2?

Cu   --> Cu+2
Cu + 2 e-   --> Cu+2
Cu  --> Cu+2  + 2 e-
Cu - 2e-  --> Cu+2

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the reduction half-reaction for the following redox reaction?
                                           Zn + HgO ⟶\longrightarrow  ZnO + Hg

Zn        ⟶\longrightarrow  Zn2+ 2e–

Hg2+      +      2e–    ⟶\longrightarrow         Hg

Zn    +    HgO

ZnO     +     Hg

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2?

Ca2+(aq) +  2Cl- (aq) → CaCl(s)
Ag+(aq)  +  Cl- (aq) → AgCl(s)
Ag +  Cl  →  AgCl
Ag+  +  Ca2+   →Ag2Ca (s)

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following half reactions correctly represents a reduction half reaction?

Fe →Fe2+ + 2e-
Pb4+ + 2e- →Pb2+
2O-2 →O2 + 4e-
Fe + 3e- →Fe3+

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Balance the following redox equations for reactions that occur in neutral solution:

Zn + Ag+ → Zn2+ + Ag

  Zn + 2Ag+ →  Zn2+ + 2Ag

  

Zn + Ag+ →  Zn2+ + Ag

  Zn + 2Ag+ → Zn2+ + Ag

Zn+ Ag+ → 2 Zn2+ + 2Ag

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