A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes. 6.1 Choose ONE word from the statement above that indicates that the cell is a galvanic cell. 6.2 Define the following: 6.2.1 Galvanic cell 6.2.2 Electrolyte 6.3 What energy conversion will take place in the cell above? 6.4 Which ONE of the electrodes is the cathode? 6.5 Write down the half-reaction at the cathode. 6.6 Calculate the emf of the cell under standard conditions. 6.7 Write down the cell notation for the cell above. 6.8 Worldwide interest in renewable energy technologies continues to see strong growth each year. The outlook remains positive, especially for alternative solar energy technology applications. 6.8.1 Name ONE alternate energy source, besides solar energy. 6.8.2 Name THREE uses of a photovoltaic cell.

NSC Technical Sciences Alternate Energies: A spontaneous electrochemical ce

A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes - NSC Technical Sciences - Question 6 - 2021 - Paper 2

Question 6

A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes. 6.1 Choose ONE word from the statement above that indicates th... show full transcript

Worked Solution & Example Answer:A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes - NSC Technical Sciences - Question 6 - 2021 - Paper 2

Step 1

6.1 Choose ONE word from the statement above that indicates that the cell is a galvanic cell.

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Answer

Galvanic

Step 2

6.2.1 Galvanic cell

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Answer

A galvanic cell is a type of electrochemical cell that generates electrical energy from spontaneous redox reactions occurring within the cell.

Step 3

6.2.2 Electrolyte

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An electrolyte is a substance that dissociates into ions when dissolved in a solvent, allowing it to conduct electricity.

Step 4

6.3 What energy conversion will take place in the cell above?

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The energy conversion that takes place is the transformation of chemical energy into electrical energy during the redox reactions.

Step 5

6.4 Which ONE of the electrodes is the cathode?

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Answer

The cathode is the silver (Ag) electrode.

Step 6

6.5 Write down the half-reaction at the cathode.

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The half-reaction at the cathode is:

ightarrow Ag(s)$$

Step 7

6.6 Calculate the emf of the cell under standard conditions.

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The standard cell potential ( $E^{ ext{o}}_{ ext{cell}}$ ) can be calculated using the reduction potentials. For Ag and Ni, the overall emf is:

$E^{ ext{o}}_{ ext{cell}} = E^{ ext{o}}_{ ext{cathode}} - E^{ ext{o}}_{ ext{anode}} = 0.80 V - (-0.27 V) = 1.07 V$

Step 8

6.7 Write down the cell notation for the cell above.

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The cell notation for the cell is: $ext{Ni}(s) | ext{Ni}^{2+}(aq) || ext{Ag}^{+}(aq) | ext{Ag}(s)$

Step 9

6.8.1 Name ONE alternate energy source, besides solar energy.

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Biomass

Step 10

6.8.2 Name THREE uses of a photovoltaic cell.

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Answer

Powering residential homes.
Providing energy to remote areas.
Charging batteries for small devices.

A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes - NSC Technical Sciences - Question 6 - 2021 - Paper 2

Worked Solution & Example Answer:A spontaneous electrochemical cell is set up under standard conditions using Ni and Ag as electrodes - NSC Technical Sciences - Question 6 - 2021 - Paper 2

6.1 Choose ONE word from the statement above that indicates that the cell is a galvanic cell.

6.2.1 Galvanic cell

6.2.2 Electrolyte

6.3 What energy conversion will take place in the cell above?

6.4 Which ONE of the electrodes is the cathode?

6.5 Write down the half-reaction at the cathode.

6.6 Calculate the emf of the cell under standard conditions.

6.7 Write down the cell notation for the cell above.

6.8.1 Name ONE alternate energy source, besides solar energy.

6.8.2 Name THREE uses of a photovoltaic cell.

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