Research scientists are developing a rechargeable magnesium-sodium, Mg-Na, hybrid cell for use in portable devices - VCE - SSCE Chemistry - Question 2 - 2021 - Paper 1
Question 2
Research scientists are developing a rechargeable magnesium-sodium, Mg-Na, hybrid cell for use in portable devices.
The Mg-Na hybrid cell uses magnesium metal and so... show full transcript
Worked Solution & Example Answer:Research scientists are developing a rechargeable magnesium-sodium, Mg-Na, hybrid cell for use in portable devices - VCE - SSCE Chemistry - Question 2 - 2021 - Paper 1
Step 1
Identify the polarity of the Mg electrode when the cell is discharging
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Answer
The Mg electrode will be negative (−) during discharging because it acts as the anode, where oxidation occurs.
Step 2
Write the half-cell equation of the reaction that occurs at the Mg electrode when the cell is discharging
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Answer
The half-cell equation is:
Mg→Mg2++2e−
This equation represents the oxidation of magnesium metal.
Step 3
What would be two potential safety hazards of having this cell in the body?
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Answer
Corrosive Reaction: The chemical reactions that take place in the hybrid cell could lead to the generation of corrosive substances which may damage surrounding tissues.
Thermal Runaway: If the cell malfunctions, it could overheat and cause burns or damage to internal organs.
