Balancing Oxidation-Reduction Equations

Question 1

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

Revolt · Accepted Answer

Upper Z n (s) right arrow upper Z n superscript 2 plus (a q) plus 2 e superscript minus.

Question 2

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

Revolt · Accepted Answer

2H+(aq) + 2e– H2(g)

Question 3

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

Revolt · Accepted Answer

Upper F e superscript 2 plus (a q) plus 2 e superscript minus right arrow upper F e (s).

Question 4

Which half-reaction correctly describes an oxidation?

Revolt · Accepted Answer

Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.

Question 5

Which statement is true of the following reaction?

Revolt · Accepted Answer

It is not balanced for oxidation state or for number of atoms.

Question 6

What is the purpose of finding oxidation states in the half-reaction method for balancing equations?

Revolt · Accepted Answer

to identify the half reactions for the equation

Question 7

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

Revolt · Accepted Answer

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).

Question 8

Equations can be balanced by using the half-reaction method. Which step should be completed immediately after finding the oxidation states of atoms?

Revolt · Accepted Answer

identifying the half reactions

Question 9

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

Revolt · Accepted Answer

6

Question 10

A student is asked to balance an equation by using the half-reaction method. He determines the two half reactions as shown below.What should he write as the final, balanced equation?

Revolt · Accepted Answer

Upper C l subscript 2 plus 2 upper B r superscript minus right arrow upper B r subscript 2 plus 2 upper C l superscript minus.

Balancing Oxidation-Reduction Equations Answers

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