manganic acid
Học thuậtThân thiện
Definition
- Noun:
- A specific inorganic chemical compound: Manganic acid is a dibasic acid with the formula H₂MnO₄. It is unstable and is not found as a pure substance, existing only in aqueous solution or as part of manganate salts.
Usage and Examples
- Noun:
- The formation of manganic acid is a key intermediate step in certain redox reactions.
- Potassium manganate contains the anion derived from manganic acid.
Advanced Usage and Notes
- Chemical Context: The term "manganic acid" is primarily used in inorganic chemistry to describe the hypothetical acid H₂MnO₄, from which manganate salts (containing the MnO₄²⁻ ion) are derived. It is contrasted with permanganic acid (HMnO₄).
- Instability: It is consistently noted that manganic acid itself is unstable and cannot be isolated, only detected in solution.
Variants and Related Words
- Manganate (noun): A salt containing the MnO₄²⁻ anion, which is the conjugate base of manganic acid.
- Sodium manganate is a green compound.
- Permanganic acid (noun): A related but stronger acid with the formula HMnO₄.
Synonyms
- H₂MnO₄: The chemical formula serves as a precise synonym in scientific contexts.
Related Chemical Terms
- Dibasic acid: An acid containing two replaceable hydrogen atoms per molecule, a category which includes manganic acid.
- Manganate ion: The MnO₄²⁻ ion, which is central to compounds related to manganic acid.
Noun
- a dibasic acid (H2MnO4) found only in solution and in manganate salts