Practice Electrochemistry (3) - Chapter 3: Electrochemistry

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6 sample questions

Question 1.
What type of cell converts chemical energy to electrical energy?
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Think about spontaneous processes.
Question 2.
What does the term 'oxidation' refer to?
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Remember OIL RIG.
3Question 3.
What is the main function of a galvanic cell?
- Convert chemical to electrical energy
- Convert electrical to chemical energy
- Measure electrical potential
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Think about energy transformations.
4Question 4.
True or False: In a redox reaction, oxidation is the gain of electrons.
- True
- False
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Remember OIL RIG for redox reactions.
Question 5.
If you need to produce 0.10 moles of hydrogen gas through electrolysis of water, how much charge must be passed through, considering that the reaction requires 2 moles of electrons for each mole of hydrogen produced?
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Relate moles of electrons to Faraday's constant.
Question 6.
A galvanic cell consisting of a Zn/Zn²⁺ and Cu/Cu²⁺ couple is set up. If the standard reduction potentials are -0.76 V for Zn and +0.34 V for Cu, what is the overall cell EMF?
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Identify which is the anode and cathode from their reactions.

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