Balancing Oxidation-Reduction Equations

Question 1

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

Revolt · Accepted Answer

determining the half reactions of chemical equations

Question 2

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

Revolt · Accepted Answer

6

Question 3

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

Revolt · Accepted Answer

Upper C l subscript 2 9 g) plus e superscript minus right arrow 2 upper C l superscript minu (a).

Question 4

Which equation describes a reduction?

Revolt · Accepted Answer

2 upper C l plus 2 e superscript minus right arrow 2 upper C l superscript minus.

Question 5

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

Revolt · Accepted Answer

3

Question 6

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 7

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.

Question 8

Consider the half reaction below.Which statement best describes what is taking place?

Revolt · Accepted Answer

Copper is being reduced.

Question 9

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 10

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)

Balancing Oxidation-Reduction Equations Answers

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