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Questions and Answers
What is electrochemistry?
Electrochemistry is the branch of physical chemistry concerned with the relationship between electrical potential difference and identifiable chemical change.
How do electrochemical reactions differ from other chemical reactions?
In electrochemical reactions, electrons are not transferred directly between atoms, ions, or molecules, but via an electronically-conducting circuit.
What are the components involved in electrochemical reactions?
Electrochemical reactions involve electrons moving via an electronically-conducting phase between electrodes separated by an ionically conducting and electronically insulating electrolyte.
What is the phenomenon that distinguishes an electrochemical reaction from a conventional chemical reaction?
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Give an example of a situation where a potential difference results from a chemical reaction.
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Study Notes
Electrochemistry Overview
- Electrochemistry examines the relationship between electrical potential difference and chemical change.
- Key processes involve the movement of electrons through an external electrical circuit.
Conducting Phases
- Reactions occur between two electrodes, which are separated by an electrolyte.
- The electrolyte is ionically conducting but electronically insulating.
- In some cases, reactions can occur without a conventional electrical circuit, such as in electroless plating.
Electrochemical Reactions
- Driven by electrical potential difference, characterized in processes like electrolysis.
- Potential differences can also arise from chemical reactions in systems like electric batteries and fuel cells.
Key Distinction
- Electrochemical reactions differ from conventional chemical reactions by electron transfer; electrons move via a circuit instead of directly between reacting species (atoms, ions, molecules).
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Description
Test your knowledge of electrochemistry with this quiz! Explore the relationship between electrical potential difference and chemical changes, electron movement, and electrode reactions. Sharpen your understanding of this fascinating branch of physical chemistry.
