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What is electrochemistry?
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Electrochemistry is the branch of chemistry that deals with the relationship between electrical energy and chemical changes, often involving redox reactions.
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What is a redox reaction?
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A redox reaction, or oxidation-reduction reaction, involves the transfer of electrons between two species, where one is oxidized and the other is reduced.
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What is the function of an electrode?
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Electrodes serve as conductive surfaces that allow the flow of electrons into or out of a system in electrochemical cells or batteries.
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What is a galvanic cell?
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A galvanic cell is an electrochemical cell that generates electrical energy from spontaneous redox reactions taking place within the cell.
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Define the term 'salt bridge' in electrochemistry.
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A salt bridge is a device used in galvanic cells to maintain electrical neutrality by allowing the exchange of ions between two half-cells.
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What is a standard electrode potential?
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Standard electrode potential is the measure of the individual potential of a reversible electrode at standard conditions, relative to the standard hydrogen electrode.
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Explain the Nernst equation.
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The Nernst equation calculates the cell potential of an electrochemical cell based on concentration of ions at non-standard conditions.
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What is electrolysis?
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Electrolysis is a process in which electrical energy is used to drive a non-spontaneous chemical reaction, often involving decomposition or ion reduction.
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Differentiate between anode and cathode in electrochemical cells.
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In electrochemical cells, the anode is where oxidation occurs, and the cathode is where reduction occurs.
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What does Faraday's Law of Electrolysis state?
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Faraday's Law of Electrolysis states that the amount of substance liberated at an electrode is directly proportional to the quantity of electricity passed through the electrolyte.
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What is a voltaic cell?
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A voltaic, or galvanic cell, uses chemical energy from a spontaneous reaction to generate electrical energy.
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Describe the role of the electrolyte in electrochemical cells.
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Electrolytes conduct ions in electrochemical cells, facilitating electron flow between anode and cathode, and maintaining cell neutrality.
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How does a Daniell cell function?
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A Daniell cell functions by converting chemical energy from zinc and copper ions into electrical energy through redox reactions.
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What is the SHE (Standard Hydrogen Electrode) used for?
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The SHE is used as a reference electrode to measure the electrode potential of other electrodes at standard conditions.
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How are electrochemical cell reactions balanced?
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Electrochemical cell reactions are balanced by ensuring equal numbers of electrons are transferred in oxidation and reduction half-reactions.
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