alkalinity
Definition
Noun 1. The state or quality of being alkaline: A chemical property of a solution, indicating its capacity to neutralize acids. It is quantitatively related to the concentration of hydroxide ions (OH⁻) and is the opposite of acidity. 2. A measure on the pH scale: Specifically, the condition of having a pH value greater than 7.
Usage
Alkalinity is a technical term used primarily in chemistry, biology, environmental science, and related fields. It describes a fundamental property of aqueous solutions. - It is used as a non-count noun (uncountable noun). - It often appears in contexts discussing water quality, soil science, chemical processes, and biological systems.
Examples
- General Use:
- The alkalinity of the lake water has increased due to limestone runoff.
- Testing the alkalinity is crucial for maintaining a healthy aquarium.
- Scientific Context:
- The experiment measured the alkalinity of various household cleaners.
- High alkalinity in soil can limit the availability of certain nutrients to plants.
Advanced Usage
- Buffering Capacity: In technical contexts, often specifically refers to a solution's ability to resist a drop in pH when an acid is added, known as its buffering capacity or acid-neutralizing capacity.
- The carbonate alkalinity of the ocean helps mitigate the effects of atmospheric CO₂.
Variants and Related Words
- Alkaline (adjective): Having the properties of an alkali; basic.
- An alkaline solution has a pH above 7.
- Alkalize (verb): To make a substance more alkaline.
- The process will alkalize the water.
Synonyms
- Basicity (noun): The state of being basic (chemically synonymous in many contexts, though can have more specific meanings in organic chemistry).
- Non-acidity (noun): A less technical term for the state of not being acidic.
Antonyms
- Acidity (noun): The state of having a pH value less than 7.
- Acidness (noun): A less common synonym for acidity.
Noun
-
pH values above 7
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