ferricyanic acid

Thân thiện

A chemist carefully handles a vial of ferricyanic acid in the laboratory.

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.

Học thuật

Noun

1. a brown unstable acid formed from ferricyanide