ferricyanic acid
Definition
Noun: * A brown, unstable, inorganic acid with the chemical formula H₃[Fe(CN)₆], formed from or related to a ferricyanide salt. It is not typically isolated as a pure substance due to its instability.
Usage
- Ferricyanic acid is a term used primarily in theoretical or historical chemical contexts to describe the acidic form of the ferricyanide ion, [Fe(CN)₆]³⁻.
- It is often mentioned in discussions of cyanide chemistry or the properties of ferricyanide salts, rather than as a common laboratory reagent.
Examples
- In the reaction, the formation of ferricyanic acid was proposed as an intermediate.
- The instability of ferricyanic acid makes it difficult to study in its pure form.
- The textbook noted that ferricyanic acid decomposes readily, releasing hydrogen cyanide.
Advanced Usage
- The conjugate base of ferricyanic acid is the ferricyanide ion, a common oxidizing agent in analytical chemistry.
Variants and Related Words
- Ferricyanide (noun): A salt containing the [Fe(CN)₆]³⁻ anion, such as potassium ferricyanide, K₃[Fe(CN)₆]. These salts are stable and commonly used.
- Hydroferricyanic Acid: An alternative, though less common, name for the same compound.
Synonyms
- Hydroferricyanic acid (chemical synonym)
Notes
- Ferricyanic acid is highly unstable and hazardous, decomposing to produce toxic hydrogen cyanide gas. It is a concept more frequently encountered in chemical equations and theoretical discussions than in practical laboratory use.
Noun
-
a brown unstable acid formed from ferricyanide
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