Question 1

Which of the following represents the correct balanced oxidation half-reaction for the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$?

Accepted Answer

$$\mathrm{Zn} \rightarrow \mathrm{Zn}^{2+} + 2e^-$$

Question 2

In the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$, which species is reduced?

Accepted Answer

$$\mathrm{Cl}_2$$

Question 3

What is the correct balanced reduction half-reaction for the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$?

Accepted Answer

$$\mathrm{Cl}_2 + 2e^- \rightarrow 2\mathrm{Cl}^-$$

Question 4

Which statement best describes what happens to zinc in the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$?

Accepted Answer

Zinc is oxidized because it loses electrons.

Question 5

In the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$, which element acts as the oxidizing agent?

Accepted Answer

$$\mathrm{Cl}_2$$

Question 6

If you were to construct a galvanic cell using the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$, which half-cell would be the anode?

Accepted Answer

The zinc electrode, where $$\mathrm{Zn} is $$oxidized.

Question 7

Which of the following best describes the flow of electrons in the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$?

Accepted Answer

Electrons flow from zinc to chlorine.

Question 8

A patient accidentally ingests a solution containing $$\mathrm{Zn}^{2+}$$ ions. Which process would occur if metallic zinc is added to the solution?

Accepted Answer

No reaction, because zinc metal cannot reduce $$\mathrm{Zn}^{2+}$$ ions.

Question 9

Which of the following is the correct net ionic equation for the reaction between zinc metal and chlorine gas?

Accepted Answer

$$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{Zn}^{2+} + 2\mathrm{Cl}^-$$

Question 10

In a laboratory, a student mixes zinc metal with chlorine gas and observes a reaction. Which observation would best confirm that a redox reaction has occurred?

Accepted Answer

The formation of a new compound and the disappearance of zinc metal.

Question 11

If 1 mole of zinc reacts completely with excess chlorine gas, how many moles of electrons are transferred in the reaction?

Accepted Answer

2 moles

Question 12

Which of the following best explains why chlorine gas is able to oxidize zinc metal?

Accepted Answer

Chlorine has a higher electron affinity than zinc.

Question 13

In the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$, what is the oxidation state of chlorine in $$\mathrm{ZnCl}_2$$?

Accepted Answer

$$-1$$

Question 14

Which of the following statements is true regarding the conservation of mass and charge in the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2$$?

Accepted Answer

Both mass and charge are conserved in the reaction.

Question 15

A chemist wants to reverse the reaction $$\mathrm{Zn} + \mathrm{Cl}_2 \rightarrow \mathrm{ZnCl}_2. $$Which process would be required?

Accepted Answer

Electrolysis of $$\mathrm{ZnCl}_2$$

Redox Reactions: Oxidation and Reduction Half-Reactions in Zn + Cl₂ → ZnCl₂

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