Strong and Weak Electrolytes An electrolyte is a substance that dissociates into ions when dissolved in water. Electrolytes can be classified into two main...
Strong and Weak Electrolytes
An electrolyte is a substance that dissociates into ions when dissolved in water. Electrolytes can be classified into two main types: strong electrolytes and weak electrolytes.
Strong Electrolytes
A strong electrolyte completely dissociates into ions when dissolved in water. This means that the solute completely breaks into hydrogen ions (H+) and hydroxide ions (OH-) when dissolved. For example, when sodium chloride (NaCl) is dissolved in water, the following reaction occurs:
Weak Electrolytes
A weak electrolyte partially dissociates into ions when dissolved in water. This means that the solute partially breaks into hydrogen ions and hydroxide ions when dissolved. For example, when potassium hydrogen carbonate (KHCO3) is dissolved in water, the following reaction occurs:
Degree of Ionization
The degree of ionization is a measure of how completely an electrolyte dissociates into ions when dissolved in water. The degree of ionization is typically expressed as a percentage. A degree of ionization of 100% indicates that the electrolyte completely dissociates into ions, while a degree of ionization of 0% indicates that the electrolyte does not dissociate into ions.
Examples
Strong electrolytes: Sodium chloride, potassium carbonate, calcium hydroxide
Weak electrolytes: Hydrochloric acid, acetic acid, ammonia
The degree of ionization can be affected by the temperature, pH, and concentration of the solution. In general, the degree of ionization increases with increasing temperature, decreases with increasing pH, and increases with increasing concentration