* Strong Bases: These completely ionize in water, releasing a large number of hydroxide ions. Common examples include:
* Group 1 hydroxides (e.g., NaOH - sodium hydroxide, KOH - potassium hydroxide)
* Group 2 hydroxides (e.g., Ca(OH)2 - calcium hydroxide, Ba(OH)2 - barium hydroxide)
* Weak Bases: These only partially ionize in water, releasing fewer hydroxide ions. Common examples include:
* Ammonia (NH3)
* Metal oxides (e.g., MgO - magnesium oxide, CuO - copper(II) oxide)
* Some organic compounds (e.g., amines)
How they work:
When a base dissolves in water, it donates hydroxide ions (OH-) to the solution. This increases the concentration of hydroxide ions, making the solution more alkaline.
Important note: The presence of hydroxide ions is a key characteristic of alkaline solutions, and it's what gives them their basic properties.
