iodide
/'aiədaid/
Definition
- Noun:
- A chemical compound: An iodide is a salt or ester of hydriodic acid (HI). It contains the iodide ion (I⁻), which is the anion of iodine.
- A source of iodine: In a broader chemical and nutritional context, an iodide is a compound that serves as a source of iodine, an essential element.
Usage Examples
- Noun:
- Potassium iodide is often added to table salt to prevent iodine deficiency.
- Silver iodide is used in cloud seeding to promote rainfall.
- The laboratory tested for the presence of iodide ions in the solution.
Advanced Usage
- In organic chemistry: The term can refer to organic compounds where iodine is bonded to a carbon atom (alkyl or aryl iodides).
- Methyl iodide is an example of a simple alkyl iodide.
- In medicine: Specific iodide compounds are used as expectorants or in thyroid treatment.
- The doctor prescribed a saturated solution of potassium iodide for the cough.
Variants and Related Words
- Iodine (n): The chemical element (I) from which iodide ions are derived.
- Iodate (n): A salt containing the IO₃⁻ anion, a different iodine-oxygen compound.
- Periodide (n): A polyiodide compound containing more than one iodine atom per anion (e.g., I₃⁻).
Synonyms
- Iodide salt: Specifically emphasizes the ionic, salt form.
- Iodide compound: A more general synonym.
Related Phrases (Chemical Terminology)
- Iodide ion: The specific anion (I⁻) present in these compounds.
- The reaction depends on the concentration of free iodide ions.
- Iodide test: A chemical test to detect the presence of iodide ions.
- A yellow precipitate with silver nitrate indicates a positive iodide test.
Noun
-
a salt or ester of hydriodic acid
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