5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode. 5.2.2 The NAME of a half-reaction that occurs at the cathode. 5.3 Write down the NAME or FORMULA of: 5.3.1 An oxidising agent 5.3.2 A reducing agent 5.4 During the reaction in the above cell, bubbles were observed on one of the electrodes. Give the NAME of the chemical substance causing the bubbles.

NSC Technical Sciences Electrolytic cells and galvanic cells: 5.1 Define the following terms:

5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode - NSC Technical Sciences - Question 5 - 2022 - Paper 2

Question 5

5.1-Define-the-following-terms:--5.1.1-Anode-5.1.2-Electrolysis--5.2-Write-down:--5.2.1-A-balanced-half-reaction-that-occurs-at-the-anode-NSC Technical Sciences-Question 5-2022-Paper 2.png

5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode. 5.2.2 The NAME of a half-r... show full transcript

Worked Solution & Example Answer:5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode - NSC Technical Sciences - Question 5 - 2022 - Paper 2

Step 1

5.1.1 Anode

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Answer

An anode is an electrode where oxidation takes place. In other words, it is the site where electrons are lost during the electrochemical reaction.

Step 2

5.1.2 Electrolysis

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Answer

Electrolysis is the decomposition of a substance when an electric current is passed through it. It refers to the chemical process in which electrical energy is converted into chemical energy.

Step 3

5.2.1 A balanced half-reaction that occurs at the anode.

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The balanced half-reaction at the anode for the electrolysis of copper(II) chloride is:

ightarrow ext{Cu}(s)$$

Step 4

5.2.2 The NAME of a half-reaction that occurs at the cathode.

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The half-reaction that occurs at the cathode involves the reduction of copper ions, which can be represented as: Copper(II) ion reduction: $ext{Cu}^{2+}(aq) + 2e^- ightarrow ext{Cu}(s)$

Step 5

5.3.1 An oxidising agent

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An oxidising agent is a substance that causes oxidation by accepting electrons. In this case, the oxidising agent is the copper(II) ion, represented as Cu $^{2+}$ .

Step 6

5.3.2 A reducing agent

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Answer

A reducing agent is a substance that donates electrons to another substance, causing reduction. In this case, the reducing agent can be considered as the electrons (e $^-$ ) given off during oxidation at the anode.

Step 7

5.4 Give the NAME of the chemical substance causing the bubbles.

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The bubbles observed on the electrode during the electrolysis are due to the production of chlorine gas (Cl $^{2}$ ), which forms at the anode.

5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode - NSC Technical Sciences - Question 5 - 2022 - Paper 2

Worked Solution & Example Answer:5.1 Define the following terms: 5.1.1 Anode 5.1.2 Electrolysis 5.2 Write down: 5.2.1 A balanced half-reaction that occurs at the anode - NSC Technical Sciences - Question 5 - 2022 - Paper 2

5.1.1 Anode

5.1.2 Electrolysis

5.2.1 A balanced half-reaction that occurs at the anode.

5.2.2 The NAME of a half-reaction that occurs at the cathode.

5.3.1 An oxidising agent

5.3.2 A reducing agent

5.4 Give the NAME of the chemical substance causing the bubbles.

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