how is electrolysis conducted? Explain Related: Do Liquids Conduct El...
Electrolysis, process by which electric current is passed through a substance to effect a chemical change. The chemical change is one in which the substance loses or gains an electron (oxidation or reduction). The process is carried out in an electrolytic cell (q.v.), an apparatus consisting of positive and negative electrodes held apart and dipped into a solution containing positively and negatively charged ions. The substance to be transformed may form the electrode, may constitute the solution, or may be dissolved in the solution. Electric current (i.e., electrons) enters through the negatively charged electrode (cathode); positively charged components of the solution travel to this electrode, combine with the electrons, and are transformed to neutral elements or molecules. The negatively charged components of the solution travel to the other electrode (anode), give up their electrons, and are transformed into neutral elements or molecules. If the substance to be transformed is the electrode, the reaction is generally one in which the electrode dissolves by giving up electrons.
Electrolysis is used extensively in metallurgical processes, such as in extraction (electrowinning) or purification (electrorefining) of metals from ores or compounds and in deposition of metals from solution (electroplating). Metallic sodium and chlorine gas are produced by the electrolysis of molten sodium chloride; electrolysis of an aqueous solution of sodium chloride yields sodium hydroxide and chlorine gas. Hydrogen and oxygen are produced by the electrolysis of water.
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how is electrolysis conducted? Explain Related: Do Liquids Conduct El...
Electrolysis:
Electrolysis is a chemical process that uses an electric current to drive a non-spontaneous chemical reaction. It involves the breaking down of a compound into its constituent elements or ions using electricity. This process is widely used in various industrial applications, including metal refining, electroplating, and water splitting.
How is electrolysis conducted?
The process of electrolysis requires a few key components and follows a specific set of steps:
1. Electrolyte: An electrolyte is a substance that conducts electricity when dissolved in a solvent or melted. It can be an ionic compound, such as an acid, salt, or base. The choice of electrolyte depends on the specific reaction and the desired products.
2. Electrodes: Electrodes are conductive materials that facilitate the flow of electricity into and out of the electrolyte. There are two types of electrodes: anode and cathode.
- Anode: The anode is the positive electrode, where oxidation occurs. It attracts negatively charged ions (anions) from the electrolyte.
- Cathode: The cathode is the negative electrode, where reduction occurs. It attracts positively charged ions (cations) from the electrolyte.
3. Electrical circuit: The setup includes a power source, such as a battery or a direct current (DC) power supply, connected to the anode and cathode. The power source provides the necessary electrical potential difference (voltage) to drive the electrolysis reaction.
4. Electrolysis process: Once the circuit is connected, the electric current flows from the power source to the anode, through the electrolyte, and to the cathode. The following reactions take place at the electrodes:
- Anode reaction (oxidation): At the anode, negative ions lose electrons and undergo oxidation. For example, in the electrolysis of water, 2H₂O → O₂ + 4H⁺ + 4e⁻, oxygen gas is produced.
- Cathode reaction (reduction): At the cathode, positive ions gain electrons and undergo reduction. Using the same example, 4H⁺ + 4e⁻ → 2H₂, hydrogen gas is produced.
5. Product formation: As the electrolysis process continues, the products of the reactions accumulate at the respective electrodes and can be collected separately.
6. Overall reaction: The overall reaction for the electrolysis process depends on the specific compound being electrolyzed. The sum of the anode and cathode reactions gives the complete reaction equation.
Do liquids conduct electricity?
Liquids can conduct electricity depending on their ability to dissociate into ions. Substances that ionize or dissociate in water or other solvents are known as electrolytes. There are three categories of liquids based on their conductivity:
1. Conductors: Certain liquids, such as strong acids (e.g., sulfuric acid), strong bases (e.g., sodium hydroxide), and salts (e.g., sodium chloride), are excellent conductors of electricity when dissolved in water or as molten liquids
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