Concept explainers
Interpretation: The voltaic cell representation, anode and cathode reactions, the electrons flow and half reactions should be discussed.
Concept introduction: Oxidation happens when an atom loses its electrons; it undergoes oxidation which is an increase in the charge. There are three conditions for oxidation:
1. Addition of oxygen.
2. Removal of hydrogen.
3. Loss of electrons.
Reduction happens when an atom gains electrons and has a decrease in oxidation state which decreases the charge on the atom. There are three conditions of reduction:
1. Removal of oxygen.
2. Addition of hydrogen.
3. Gain of electrons.
Redox reactions are the reactions in which oxidation and reduction both takes place simultaneously.
Cell reaction consists of anode and cathode which is divided by a salt bridge.
At anode: oxidation takes place.
At cathode: reduction takes place.
Electrons flow from anode to cathode.
Voltaic cell is an
To write: The voltaic cell reaction, anode and cathode reaction, and the direction of electron flow.
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Chemistry: Structure and Properties Custom Edition for Rutgers University General Chemistry
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- What is the standard cell potential you would obtain from a cell at 25C using an electrode in which Hg22+(aq) is in contact with mercury metal and an electrode in which an aluminum strip dips into a solution of Al3+(aq)?arrow_forwardA voltaic cell is constructed using the reaction Mg(s) + 2H+(aq) Mg2+(aq) + H2(g) (a) Write equations for the oxidation and reduction half-reactions. (b) Which half-reaction occurs in the anode compartment, and which occurs in the cathode compartment? (c) Complete the following sentences: Electrons in the external circuit flow from the ________ electrode to the ______ electrode. Negative ions move in the salt bridge from the ______ half-cell to the ______ half-cell. The half-reaction at the anode is ____, and that at the cathode is _____.arrow_forward
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