Multiple Choice
In the electrochemical cell based on the reaction Zn(s) + Cu^{2+}(aq) → Zn^{2+}(aq) + Cu(s), which of the following correctly lists the half-reactions occurring at the anode and cathode?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
Multiple Choice
In redox reactions, oxidation is best defined as which process, and reduction is best defined as which process?
A
Oxidation is gain of protons and reduction is loss of protons.
B
Oxidation is decrease in oxidation number and reduction is increase in oxidation number.
C
Oxidation is gain of electrons and reduction is loss of electrons.
D
Oxidation is loss of electrons and reduction is gain of electrons.
Verified step by step guidance1
Understand that redox reactions involve the transfer of electrons between species.
Recall the definitions: Oxidation is the process where a species loses electrons, resulting in an increase in its oxidation number.
Similarly, reduction is the process where a species gains electrons, resulting in a decrease in its oxidation number.
Recognize that protons (H⁺) are not directly involved in defining oxidation or reduction; the key is the movement of electrons.
Therefore, the correct definitions are: Oxidation is loss of electrons, and reduction is gain of electrons.
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