Write down the NAME of component X - NSC Technical Sciences - Question 5 - 2021 - Paper 2
Question 5
Write down the NAME of component X.
Give a reason why component X is important in the cell above.
Redraw the diagram above in your ANSWER BOOK and label both t... show full transcript
Worked Solution & Example Answer:Write down the NAME of component X - NSC Technical Sciences - Question 5 - 2021 - Paper 2
Step 1
5.1 Write down the NAME of component X.
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Answer
The component X is a Cell/Battery/Power Source.
Step 2
5.2 Give a reason why component X is important in the cell above.
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Answer
Component X is a source of electrical energy needed to drive the non-spontaneous reaction in the electrolysis of copper (II) chloride.
Step 3
5.3 Redraw the diagram above in your ANSWER BOOK and label both the anode and cathode, as well as component X. Indicate component X with the CORRECT symbol.
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Answer
In the drawn diagram, label the left electrode as the Anode and the right electrode as the Cathode. Component X should be labeled as a Cell or Battery.
Step 4
5.4 Write down the chemical formula of the electrolyte.
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Answer
The chemical formula of the electrolyte is CuCl₂.
Step 5
5.5 Compare the anode and the cathode with regard to the following:
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Answer
5.5.1 Type of half-reaction:
Anode: oxidation (Cu → Cu²⁺ + 2e⁻)
Cathode: reduction (Cu²⁺ + 2e⁻ → Cu)
5.5.2 Polarity of the electrode:
The Anode is positive, and the Cathode is negative.
Step 6
5.6 Write down the half-reaction that takes place at the negative electrode.
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Answer
The half-reaction at the negative electrode is: Cu²⁺(aq) + 2e⁻ → Cu(s).
Step 7
5.7 Write down the net cell reaction for the cell above.
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Answer
The net cell reaction is:
2CuCl₂(aq) → 2Cu(s) + Cl₂(g).
