Interpretation : To determine the electrode at which the reduction takes place.
Concept Introduction : Reduction is defined as the loss of oxygen and the gaining of electrons. In the case of an
Answer to Problem 92A
Reduction takes place in a cathode. The cathode is negatively charged.
Explanation of Solution
If an electrochemical cell such as a galvanic cell is considered with copper as a cathode and zinc as an anode, dipped in their respective electrolytes. Zinc will get oxidized and lose electrons and form zinc ions whereas these electrons are gained by the copper ions in the electrolyte and get deposited as copper.
The reaction at the cathode is:
The reaction at the anode is
From this example, it is clear that reduction takes place at the cathode and oxidation takes place at the anode.
Since the cathode attracts the cations and the electrons are pumped toward the cathode it will be negatively charged.
The electrochemical cell is a cell in which chemical energy is converted into electrical energy. This generation of electrical energy can take place only if there is continuous
Chapter 23 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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