The method by which ions are pulled out of salt water by direct current and employing thin and rigid membrane is called

How would you isolate pure water from salt water?

Electrodialysis (ED)CharacteristicsSelective Ion Removal: Electrodialysis specifically removes dissolved ionic species (both cations and anions) from water.Ion Exchange Membranes: Utilizes cation and anion exchange membranes that allow selective passage of ions.Electric Field Driven: The process relies on an applied electric field to drive ion movement across membranes.Scalability: Suitable for a range of scales, from small laboratory setups to large industrial applications.Energy Efficiency: Generally more energy-efficient than thermal desalination processes, especially for brackish water desalination.Minimal Chemical Use: Requires minimal use of chemicals compared to traditional ion exchange processes.ProcessSetup:Stack Configuration: ED systems consist of multiple cell pairs, each containing a cation exchange membrane (CEM), an anion exchange membrane (AEM), and a spacer for the flow of dilute and concentrate solutions.Electrodes: An anode (positive electrode) and a cathode (negative electrode) are placed at either end of the stack.Ion Migration:Electric Field Application: When a direct current (DC) electric field is applied, cations migrate towards the cathode, passing through the CEM, while anions migrate towards the anode, passing through the AEM.Ion Separation: As ions move through their respective membranes, they are removed from the dilute compartments and collected in the concentrate compartments.Water Flow:Dilute Stream: Water flows through the dilute compartments, losing ions and becoming purified.Concentrate Stream: Water flows through the concentrate compartments, gaining ions and becoming a concentrated brine solution.Collection:Deionized Water: The purified (deionized) water from the dilute compartments is collected for use.Concentrated Brine: The concentrated brine from the concentrate compartments is collected for disposal or further treatment.FunctionIon Removal: The primary function of ED is to remove dissolved ionic contaminants (e.g., salts) from water to produce high-purity water.Desalination: Commonly used for desalination of brackish water and seawater.Water Purification: Applied in producing high-purity water for industrial, laboratory, and municipal applications.Waste Minimization: Reduces the volume of waste streams by concentrating dissolved ions into a smaller volume.Regeneration: Unlike conventional ion exchange, ED does not require frequent chemical regeneration, as the process is driven by electricity.

What name is given to the process by which water moves across a membrane?

Briefly discuss the ion exchange water softening process with a neat sketch

5Sea salt is often used in cooking. Ocean water is a natural solution made up of sea salt and water. The sea salt can be separated from the water by heating the solution until all of the liquid water turns into a gas. When the liquid water is gone, the solid sea salt is left behind and can be packaged and sold.What method is used in the description above to separate the sea salt from the ocean water? A. filtration B. sorting C. magnetism D. evaporation