Here's a breakdown:
* Hydroxide ions (OH-) are negatively charged ions that are characteristic of alkaline (basic) solutions.
* Bases are substances that, when dissolved in water, produce hydroxide ions. This increases the pH of the solution, making it more alkaline.
Examples of bases:
* Sodium hydroxide (NaOH): A strong base that completely dissociates in water to form sodium ions (Na+) and hydroxide ions (OH-).
* Calcium hydroxide (Ca(OH)2): A strong base that also dissociates fully in water.
* Ammonia (NH3): A weak base that reacts with water to form ammonium ions (NH4+) and hydroxide ions (OH-).
Important note: The terms "base" and "alkali" are sometimes used interchangeably, but technically, an alkali refers specifically to a base that dissolves in water. However, in most contexts, the two terms are used synonymously.
