dichromate
/dai'koumit/
Definition
- Noun:
- A chemical compound: A dichromate is a salt containing the anion Cr₂O₇²⁻, derived from dichromic acid. It is characterized by its bright orange or red color and strong oxidizing properties.
Usage
- As a noun (countable/uncountable): The term "dichromate" is used to refer to the chemical ion or specific salts containing it. It is commonly used in chemistry, industrial processes, and historical photographic techniques.
- Potassium dichromate is often used in laboratory experiments as an oxidizing agent.
- The old photographic process relied on the light-sensitive properties of ammonium dichromate.
Advanced Usage
- In specific compounds: The name is typically preceded by the cation to specify the exact salt.
- Sodium dichromate is a common industrial chemical.
- In environmental and safety contexts: Dichromates are often discussed regarding their toxicity and environmental impact.
- Proper disposal of dichromate waste is essential due to its hexavalent chromium content.
Variants and Related Words
- Dichromic acid (n): The hypothetical acid (H₂Cr₂O₇) from which dichromates are derived.
- Chromate (n): A related salt containing the CrO₄²⁻ anion, often interconvertible with dichromate under different pH conditions.
- Bichromate (n): An older, synonymous term for dichromate, now less common in technical use.
Synonyms
- Bichromate: An exact synonym, though "dichromate" is the preferred IUPAC name.
Related Phrases / Idioms
(Not commonly used in idiomatic expressions due to its technical nature.)
Noun
-
a salt of the hypothetical dichromic acid
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