SCS Yr 12 Chem Redox

Identify the correct definition of reduction with respect to electron transfer.

• Reduction is losing electrons
• Reduction is gaining electrons
• Reductions is losing protons
• Reduction is gaining protins

Identify the correct definition of reduction with respect to oxidation number.

• Reduction shows no change in oxidation number.
• Reduction is gaining oxidation number
• Reduction is decreasing in oxidation number
• Reduction is increasing in oxidation number

Identify the correct definition of oxidation with respect to oxidation number.

• Oxidation shows no change in oxidation number.
• Oxidation is losing oxidation number
• Oxidation is decreasing in oxidation number
• Oxidation is increasing in oxidation number

Identify the correct definition of oxidation with respect to electron transfer.

• Oxidation is losing electrons
• Oxidation is gaining electrons
• Oxidation is losing protons
• Oxidation is gaining protons

Identify the correct oxidation equation for magnesium forming magnesium ions.

• Mg + e^-  --> Mg⁺
• Mg --> Mg²⁺   +  2e^-
• Mg + 2e^-  --> Mg²⁺
• Mg --> Mg⁺  +  e^-

Identify the correct oxidation equation for Aluminium forming Aluminium ions.

• Al + e^-  --> Al⁺
• Al --> Al²⁺   +  2e^-
• Al + 3e^-  --> Al³⁺
• Al --> Al³⁺ +  3e^-

Identify the correct reduction equation for chlorine gas forming chloride ions.

• Cl + e^-  --> Cl^-
• Cl₂  +  2e^- --> 2Cl^-
• Cl  +  2e^- --> 2Cl^-
• Cl₂  --> 2Cl^-  + 2e^-

Identify the correct reduction equation for oxygen forming oxide ions.

• O + e^-  --> O^-
• O₂  +  2e^- --> 2O^-
• O  +  2e^- --> O^2-
• O₂  + 4e^- --> 2O^2- 

Identify the correct reducing agent.

• Na    --> Na⁺  +   e^-
• Cl₂  +  2e^- --> 2Cl^-
• Mg   +  2e^-  --> Mg²⁺  
• O₂  + 4e^- --> 2O^2- 

Identify the correct oxidising agent.

• Na    --> Na⁺  +   e^-
• Cl₂   --> 2Cl^- +  2e^- 
• Mg  --> Mg²⁺  +  2e^-  
• O₂  + 4e^- --> 2O^2-