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The sodium-sulfur cell shown below is a secondary galvanic cell with the overall cell reaction $$2Na(l) + S(l) \rightarrow Na_2S(l)$$ The cell produces 2.1 volts - VCE - SSCE Chemistry - Question 12 - 2009 - Paper 1
Question 12
The sodium-sulfur cell shown below is a secondary galvanic cell with the overall cell reaction $$2Na(l) + S(l) \rightarrow Na_2S(l)$$ The cell produces 2.1 volts. ... show full transcript
Worked Solution & Example Answer:The sodium-sulfur cell shown below is a secondary galvanic cell with the overall cell reaction $$2Na(l) + S(l) \rightarrow Na_2S(l)$$ The cell produces 2.1 volts - VCE - SSCE Chemistry - Question 12 - 2009 - Paper 1
Step 1
Which one of the following best describes the arrangement for recharging the cell?
Answer
To effectively recharge a sodium-sulfur cell, the power supply voltage must be greater than the cell's output voltage of 2.1 volts. This ensures that the current flows in the right direction, allowing the electrochemical reaction to reverse. Based on the options given, the correct arrangement is:
D. more than 2.1 volts
This means connecting terminals A to D and B to C using a power supply voltage greater than 2.1 volts to successfully recharge the cell.