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Questions and Answers
What is the process of chemical decomposition of a substance using an electric current called?
What is the process of chemical decomposition of a substance using an electric current called?
What is the type of electrolysis where a chemical reaction generates an electric current?
What is the type of electrolysis where a chemical reaction generates an electric current?
At which electrode does oxidation occur?
At which electrode does oxidation occur?
What is the purpose of electrolysis in metal extraction?
What is the purpose of electrolysis in metal extraction?
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What is the effect of increasing the concentration of electrolyte on the rate of electrolysis?
What is the effect of increasing the concentration of electrolyte on the rate of electrolysis?
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What is the application of electrolysis in depositing a thin layer of a metal onto another metal?
What is the application of electrolysis in depositing a thin layer of a metal onto another metal?
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Study Notes
Overview of Electrolysis
- Electrolysis is a process of chemical decomposition of a substance using an electric current.
- It involves the transfer of ions between two electrodes, an anode and a cathode, immersed in an electrolyte.
Types of Electrolysis
- Galvanic Electrolysis: Spontaneous reaction, where a chemical reaction generates an electric current (e.g., battery).
- Electrolytic Electrolysis: Non-spontaneous reaction, where an electric current drives a chemical reaction (e.g., electrolysis of water).
Electrolysis Process
-
Anode:
- Oxidation reaction occurs (loss of electrons)
- Species is oxidized (e.g., Cl- → Cl2)
-
Cathode:
- Reduction reaction occurs (gain of electrons)
- Species is reduced (e.g., H+ → H2)
Applications of Electrolysis
- Extraction of metals: Electrolysis is used to extract metals from their ores, such as aluminum and copper.
- Production of chemicals: Electrolysis is used to produce chemicals like chlorine, oxygen, and hydrogen.
- Electroplating: Electrolysis is used to deposit a thin layer of a metal onto another metal, such as chrome plating.
Factors Affecting Electrolysis
- Voltage: Increasing voltage increases the rate of electrolysis.
- Current: Increasing current increases the rate of electrolysis.
- Concentration of electrolyte: Increasing concentration of electrolyte increases the rate of electrolysis.
- Temperature: Increasing temperature increases the rate of electrolysis.
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Description
Discover the process of electrolysis, types of electrolysis, the electrolysis process, applications, and factors affecting electrolysis. Learn about galvanic and electrolytic electrolysis, anode and cathode reactions, and more.
