Strong Electrolyte
Definition and meaning of Strong Electrolyte in chemistry.
A strong electrolyte is a chemical solute that completely, or almost completely, dissociates into distinct mobile ions when introduced and dissolved in a polar solvent, typically liquid water. These concentrated solutions are exceptionally excellent conductors of electricity due to the incredibly high concentration of freely moving charged ions.
In more detail
When a strong electrolyte is added to water, the chemical dissolution reaction essentially goes to 100 percent completion, leaving virtually no intact neutral molecules remaining in the solution. The three major chemical categories of strong electrolytes include strong mineral acids, strong alkaline bases, and most highly soluble ionic salts. Because they separate entirely into their constituent positively charged cations and negatively charged anions, calculating the resulting exact ion concentrations in the beaker is extremely straightforward and relies entirely on the initial molar concentration of the added solid solute.
Key facts
| Field | General Chemistry |
|---|---|
| Formula | NaCl |
| Dissociation | 100 percent complete in dilute solutions |
| Conductivity | Extremely high electrical conductivity |
Sodium chloride (NaCl) is a classic strong electrolyte because it fully and rapidly dissociates into distinct Na+ and Cl- ions when stirred into water.
Frequently asked questions
What is the primary difference between a strong and a weak electrolyte?
A strong electrolyte dissociates completely and permanently into free ions, whereas a weak electrolyte only partially dissociates, establishing a dynamic equilibrium with neutral molecules.