AS91393 Electrochemical cells and Electrolysis

The E⁰ value for all electrolysis reactions is

• positive

• neutral

• negative

The E⁰ value for all electrochemical cell reactions is

• positive

• neutral

• negative

If a half cell has a high reduction potential it prefers to be

• oxidised

• reduced

What type of cell has spontaneous reactions

• Electrochemical

• Electrolysis

What half cell would prefer to be reduced the most?

• F₂ l F^-

• Co³⁺ l Co²⁺

• Au³⁺ l Au

• Cl₂ l Cl^-

What half cell would prefer to be oxidised the most?

• F₂ l F^-

• Co³⁺ l Co²⁺

• Au³⁺ l Au

• Cl₂ l Cl^-

In an electrochemical cell set up between Co³⁺ l Co²⁺ and Cl₂ l Cl^- what would be reduced?

• Co³⁺

• Co²⁺

• Cl₂

• Cl^-

In an electrochemical cell set up between F₂ l F^- and Co³⁺ l Co²⁺ what would be oxidised?

• F₂

• F^-

• Co³⁺

• Co²⁺

What prefers to be reduced more Au³⁺ or Co³⁺

• Co³⁺

• Au³⁺

• they prefer to be reduced the same

• both want to be oxidised

What prefers to be oxidised more Cl₂ or F₂?

• F₂

• Cl₂

• they prefer to be oxidised the same

• both want to be reduced