Redox - Displacement of Metals

What is Electrochemical Series?

• Arrangement of metals based on tendency of metal atom to release its ion and become neutral

• Arrangement of metals based on tendency of metal atom to accept electron and become neutral particle

• Arrangement of metals based on tendency of metal atom to release its electron and become positive ion

• Arrangement of metals based on tendency of metal ion to release its charges and become neutral

Which one is NOT the uses of Electrochemical Series?

• to predict the terminal of chemical cell

• to predict the voltage of chemical cell

• to predict the metal displacement reaction

• To predict the selected ion to be neutralised at the electrode in an electrolysis

Name substance that undergoes oxidation?

• Water

• Zinc

• Copper (II) sulphate solution

• Copper (II) ion

Which substance undergoes reduction?

• water

• Zinc

• Copper (II) sulphate solution

• Sulphate ion

What is the function of Zinc in this reaction?

• to accept electron

• to release electron

• oxidizing agent

• reducing agent

What is the function of Copper (II) sulphate solution?

• to release electron

• to accept electron

• as a reducing agent

• as an oxidizing agent

Write a chemical equation involved.

• Cu + ZnSO₄ --> CuSO₄ + Zn

• Zn + CuSO₄ --> ZnSO₄ + Cu

• Cu²⁺ + Zn --> Zn²⁺ + Cu

• Zn²⁺ + Cu --> Zn + Cu²⁺

Write an ionic equation involved.

• Cu + ZnSO₄ --> CuSO₄ + Zn

• Zn + CuSO₄ --> ZnSO₄ + Cu

• Cu²⁺ + Zn --> Zn²⁺ + Cu

• Zn²⁺ + Cu --> Zn + Cu²⁺

Choose the correct observation in this reaction.

• Zinc plate dissolve

• Brown solid formed

• blue solution turn to colourless

• intensity of blue solution increases

State the changes of oxidation number for Copper in the reaction.

• 0 to +2

• +1 to +2

• +2 to 0

• +2 to +1