AnswersEDG CHEM ES WLABS2P – Q2_9Oxidation-Reduction

Balancing Oxidation-Reduction Equations Answers

0 verified answers1 views
1
Free Preview

Consider the chemical reaction below. Zn(s) + 2H+(aq) Zn2+(aq) + H2(g)Which half reaction correctly represents reduction for this equation?

Question illustration
A
Zn(s) Zn2+(aq) + 2e–
Option A
B
2H+(aq) + 2e– H2(g)
Option B
C
Zn(s) Zn2+(aq) + e–
Option C
D
2H+(aq) + e– H2(g)
Option D
2
Free Preview

Which is an important step in the alternate method for balancing equations in redox reactions?

A
indicating the types of bonds found in the molecules
B
determining the speed at which reactions take place
C
determining the half reactions of chemical equations
D
indicating the temperature at which the reaction occurs
3

Which equation describes a reduction?

A
Upper M g (s) right arrow Uper M g superscript 2 plus (a q) plus 2 e superscript minus.
Option A
B
2 upper C l plus 2 e superscript minus right arrow 2 upper C l superscript minus.
Option B
C
Upper N a (s) right arrow upper N a superscript plus (a q) plus e superscript minus.
Option C
D
Upper A l (s) right arrow upper A l superscript 3 plus (a q) plus 3 e superscript minus.
Option D
4

Consider the reaction below. Which half reaction correctly describes the reduction that is taking place?

Question illustration
A
Upper C l subscript 2 9 g) plus e superscript minus right arrow 2 upper C l superscript minu (a).
Option A
B
Upper C l subscript 2 (g) plus e superscript minus right arrow 2 upper C l superscript minus (a q).
Option B
C
2 upper I superscript minus (a q) right arrow upper I subscript 2 (a q) plus 2 e subscript minus.
Option C
D
2 upper I superscript minus (a q) right arrow upper I subscript 2 (a q) plus e superscript minus.
Option D
5

A student balances the following redox reaction using half-reactions.How many electrons will be lost in all?

Question illustration
A
1
B
2
C
5
D
6
6

The information below describes a redox reaction.What is the final, balanced equation for this reaction?

Question illustration
A
2 upper C r superscript 3 plus (a q) plus 6 upper C l superscript minus (a q) right arrow 2 upper C r (s) plus 3 upper C l subscript 2 (g).
Option A
B
2 upper C r superscript 3 plus (a q) plus 2 upper C l superscript minus (a q) plus 6 e superscript minus right arrow upper C l subscript 2 (g) plus 2 upper C r (s).
Option B
C
Upper C r superscript 3 plus (a q) plus 6 upper C l superscript minus (a q) plus 3 e superscript minus right arrow 2 upper r (s) plus 3 upper C l subscript 2 (g).
Option C
D
Upper C r superscript 3 plus (a q) plus 2 upper C l superscript minus (a q) right arrow upper C r (s) plus upper C l subscript 2 (g).
Option D
7

Which half-reaction correctly describes an oxidation?

A
Upper C a (s) plus 2 e superscript minus right arrow upper C a superscript 2 plus (a q).
Option A
B
Upper B r subscript 2 plus 2 e superscript minus right arrow 2 upper B r superscript minus.
Option B
C
Upper N a superscript plus (a q) right arrow upper N a (s) plus e superscript minus.
Option C
D
Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.
Option D
8

Which statement is true of the following reaction?

Question illustration
A
It is balanced for oxidation state and for number of atoms.
B
It is not balanced for oxidation state or for number of atoms.
C
It is not balanced for oxidation state but is balanced for number of atoms.
D
It is balanced for oxidation state but is not balanced for number of atoms.
9

The information below describes a redox reaction.What is the coefficient of silver in the final, balanced equation for this reaction?

Question illustration
A
1
B
2
C
3
D
4
10

Consider the redox reaction below.Which equation is a half reaction that describes the reduction that is taking place?

Question illustration
A
Upper F e superscript 2 plus (a q) plus 2 e superscript minus right arrow upper F e (s).
Option A
B
Upper M g (s) right arrow upper M g superscript 2 plus (a q) plus 2 e superscript minus.
Option B
C
Upper Fe superscript 2 plus (a q) right arrow upper F e (s) plus 2 e superscript minus.
Option C
D
Upper M g (s) plus 2 e superscript minus right arrow upper Mg superscript 2 plus (a q).
Option D

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Quiz

Quiz
10 verified answers

Oxidation-Reduction

Quiz
10 verified answers

The Nucleus