Cation exchange
Cation Exchange
Cation exchange (pronunciation: /ˈkatʌɪɒn ɪksˈtʃeɪndʒ/) is a chemical process that involves the interchange of cations between a solution and a solid, typically a soil or a resin. The term is derived from the Greek word 'kata' meaning 'down' and 'ion' meaning 'going', referring to the movement of ions in the process.
Process
In cation exchange, cations in a solution can be replaced by other cations from a solid. This process is commonly used in water softening, where calcium and magnesium ions in hard water are replaced with sodium ions.
Applications
Cation exchange is used in various fields such as chemistry, biology, and environmental science. In chemistry, it is used for purifying solutions, while in biology, it is used in the study of cell membranes. In environmental science, it is used in water treatment processes.
Related Terms
- Anion Exchange: The process of exchanging anions between a solution and a solid.
- Ion Exchange: A process that involves the exchange of ions between two electrolytes or between an electrolyte solution and a complex.
- Ion Exchange Resin: A resin or polymer that acts as a medium for ion exchange.
- Water Softening: The process of removing calcium, magnesium, and certain other metal cations in hard water.
External links
- Medical encyclopedia article on Cation exchange
- Wikipedia's article - Cation exchange
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