kation

A scientist draws a diagram of a kation on the whiteboard.

Definition

1. Noun:
   • A positively charged ion: "kation" is a variant spelling of "cation," referring to an ion that has a positive electrical charge, typically attracted to the cathode in electrolysis.

Usage Examples

• Noun:
  • In the electrolysis of salt water, the kation moves toward the negative electrode. (The positively charged ion migrates to the cathode.)
  • The solution contains both kations and anions, which balance the overall charge. (The positive and negative ions coexist in the liquid.)

Advanced Usage

• "kation exchange": a process in which kations in a solution are swapped with other kations on a solid material, often used in water softening.
  • Water softeners use a resin to perform kation exchange, replacing calcium and magnesium with sodium. (The device swaps unwanted positive ions for harmless ones.)

Variants and Related Words

• Cation (n): the standard spelling of "kation," meaning a positively charged ion.
  • A cation is formed when an atom loses one or more electrons. (The atom becomes positively charged.)
• Anion (n): a negatively charged ion, opposite of a kation.
  • In a battery, anions move toward the anode. (Negative ions flow to the positive terminal.)

Synonyms

• Positive ion: an ion carrying a positive charge.
  • Sodium (Na⁺) is a common positive ion in biological systems. (It is a kation.)

Related Idioms

• No common idioms: "kation" is a technical term without idiomatic usage.