Worksheet: Redox Reactions
In this worksheet, we will practice identifying redox reactions and writing ionic equations to describe electron transfer between oxidants and reductants.
Q5:
Which of the following statements is true?
- AHydrogen ions can never act as a reducing agent.
- BAcid–base reactions always involve two different species.
- CAcid–base reactions always produce water.
- DMolecular oxygen can never act as a reducing agent.
- EReduction–oxidation reactions always produce at least two different species.
Q6:
Which of the following is not an oxidation–reduction reaction?
- A
- B
- C
- D
- E
Q7:
A piece of magnesium oxide is heated with hydrogen until the magnesium is recovered. Is the magnesium oxide being oxidized or reduced?
- AReduced
- BOxidized
Q8:
Which of the following half-equations describes an oxidation?
- A
- B
- C
- D
- E
Q9:
Which of the following half-equations describes a reduction?
- A
- B
- C
- D
- E
Q11:
Cesium can be produced by reacting calcium with cesium chloride, according to the equation:
Which substance is being reduced?
- A
- B
- C
- D
Which substance is being oxidized?
- A
- B
- C
- D
Q12:
A piece of magnesium left in air is gradually converted to magnesium oxide. Is this reaction an example of oxidation or reduction?
- AReduction
- BOxidation
Q14:
Consider the equation shown.
Which arrow shows reduction?
- AB
- BA
Which arrow involves the loss of electrons?
- AB
- BA
Which arrow involves the gain of electrons?
- AA
- BB
Q15:
Which of the following statements about the following ionic equation is incorrect?
- AZinc atoms becoming zinc ions is oxidation.
- BZinc atoms becoming zinc ions is reduction.
- CSilver ions becoming silver atoms is reduction.
- DSilver ions gain electrons.
- EZinc acts as a reducing agent.