Redox Reaction Post-Lab Quiz

What is the main purpose of this lab experiment?

• To observe a color change in solutions

• To understand the redox reaction between copper (II) sulfate and zinc

• To learn how to use a weighing scale

• To practice pouring solutions into a beaker

What is the balanced chemical equation for the reaction between zinc and copper (II) sulfate?

• Zn + CuSO₄ → ZnSO₄ + Cu

• Cu + ZnSO₄ → CuSO₄ + Zn

• ZnSO₄ + Cu → Zn + CuSO₄

• Zn + Cu → ZnCu₂

What is the expected color change observed during the reaction?

• Colorless to blue

• Blue to green

• Blue to colorless

• Green to blue

Which of the following is the reducing agent in the reaction? Or, in other words, which of the following is oxidized?

• Copper (II) sulfate

• Zinc metal

• The solution itself

• Water

During the experiment, what solid is formed when zinc reacts with copper (II) sulfate?

• Zinc sulfate

• Copper

• Zinc oxide

• Copper oxide

Which observation indicates that a chemical reaction is taking place between zinc and copper (II) sulfate? (select all that apply)

• Formation of a gas

• Change in color

• Temperature change

• Formation of a new substance

What is the oxidizing agent in the redox reaction between zinc and copper (II) sulfate? In other words, what is reduced?

• Zn

• Cu²⁺

• SO₄^2-

• H₂O

Which of the following is considered a "spectator ion" in this reaction? In other words, it does not get involved?

• Zn

• Cu²⁺

• SO₄^2-

• H₂O

What is the physical state of copper (II) sulfate in the reaction?

• Solid

• Liquid

• Gas

• Aqueous solution

What is the physical state of zinc in the reaction?

• Solid

• Liquid

• Gas

• Aqueous solution