Practice Half-reactions (4) - Redox Reactions - IB 10 Sciences (Group 4)

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9 questions

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6 sample questions

Question 1.
What happens during oxidation?
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Think about the mnemonic OIL RIG.
Question 2.
What is gained during reduction?
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Remember the 'gain' in RIG.
3Question 3.
Which of the following describes oxidation?
- Gaining electrons
- Losing electrons
- No change in electrons
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Remember oxidizing agents take electrons away.
4Question 4.
True or False: Half-reactions can be used to visualize electron transfer in redox reactions.
- True
- False
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Think about whether they simplify the process.
Question 5.
You are given a reaction where Ag⁺ + Fe → Ag + Fe²⁺. Write its half-reactions and identify the oxidizing and reducing agents.
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Look at which species loses and gains electrons.
Question 6.
Balance the equation: Cr₂O₇²⁻ + H₂ → Cr³⁺ + H₂O. Show half-reactions as part of your solution.
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Focus on balancing charges and mass separately for oxidation and reduction.

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