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(a)
Interpretation: In the given electrolyte cell, MX is an ionic compound. The electrode at which reduction occurs needs to be identified.
Concept Introduction: In electrolytic cells, an
(a)
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Explanation of Solution
In an electrolytic cell, the anode is a positive electrode (as it is connected to the positive terminal of the battery) and the cathode is a negative electrode (connected to the negative terminal of the battery). Also, in an electrolytic cell, reduction occurs at the cathode. Thus, the negative electrode shown on the right-hand side is where reduction occurs.
(b)
Interpretation: The electrode at which electrons are being released by ions needs to be identified.
Concept Introduction: In electrolytic cells, an electric current makes a non-spontaneous redox reaction take place. The process by which electrical energy is converted to chemical energy is known as electrolysis.
(b)
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Explanation of Solution
Electrons are released by ions when oxidation takes place. In an electrolytic cell, oxidation occurs at the anode. Also, in an electrolytic cell, the anode is a positive electrode (as it is connected to the positive terminal of the battery) and the cathode is a negative electrode (connected to the negative terminal of the battery). Thus, the positive electrode shown on the left-hand side is where oxidation occurs.
(c)
Interpretation: The electrode at which electrons enter the cell needs to be identified.
Concept Introduction: In electrolytic cells, an electric current makes a non-spontaneous redox reaction take place. The process by which electrical energy is converted to chemical energy is known as electrolysis.
(c)
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Explanation of Solution
The movement of electrons takes place from the positive to the negative electrode of an electrolytic cell; thus, the electrode at which electrons enter the cell is the negative electrode.
(d)
Interpretation: The electrode at which elemental M is formed needs to be identified.
Concept Introduction: In electrolytic cells, an electric current makes a non-spontaneous redox reaction take place. The process by which electrical energy is converted to chemical energy is known as electrolysis.
(d)
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Explanation of Solution
According to the question, given electrolyte MX is an ionic compound. The formation of elemental M from its ion takes place after reduction. Since reduction occurs at the cathode (negative electrode), thus, the electrode at which elemental M is formed is the right-hand side electrode.
Chapter 21 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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