manganate
C2Technical / Scientific
Definition
Meaning
A salt containing the anion MnO₄²⁻, where manganese is in the +6 oxidation state.
In chemistry, a compound derived from manganic acid (H₂MnO₄). Potassium manganate (K₂MnO₄) is a common, often green-coloured intermediate in the production of potassium permanganate.
Linguistics
Semantic Notes
This is a purely technical, inorganic chemistry term. It refers to a specific ion and its compounds. It should not be confused with 'permanganate' (MnO₄⁻), which is more common and contains manganese in the +7 oxidation state.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation may follow regional patterns for vowel sounds.
Connotations
None beyond the scientific meaning.
Frequency
Identically low frequency in both technical chemistry contexts. The average speaker in either region would be unlikely to know the term.
Vocabulary
Collocations
Grammar
Valency Patterns
[adjective] + manganatemanganate + [preposition] (e.g., in solution, of potassium)Vocabulary
Synonyms
Weak
Usage
Context Usage
Business
Not used.
Academic
Exclusively used in chemistry textbooks, research papers, and laboratory reports discussing redox chemistry or inorganic synthesis.
Everyday
Virtually never used.
Technical
Core term in inorganic and analytical chemistry, specifically in contexts of manganese chemistry, oxidation states, and the production of permanganates.
Examples
By Part of Speech
adjective
British English
- The manganate solution was a distinctive green colour.
- They studied the manganate ion's stability.
American English
- The manganate solution was a distinct green color.
- They studied the manganate ion's stability.
Examples
By CEFR Level
- In the lab, we created a green solution of potassium manganate.
- Manganate is an intermediate compound in some chemical processes.
- The disproportionation of manganate in acidic solution yields manganese dioxide and permanganate ions.
- The visible absorption spectrum of the manganate anion shows a characteristic band in the green region.
Learning
Memory Aids
Mnemonic
Think: MANGA-NATE. A manga character (green hair?) ate a green crystal of potassium manganate.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не путать с 'перманганат' (permanganate). 'Manganate' - манганат (степень окисления Mn +6), 'permanganate' - перманганат (степень окисления Mn +7).
Common Mistakes
- Confusing 'manganate' with the more common 'permanganate'.
- Misspelling as 'manganeseate'.
Practice
Quiz
What is the oxidation state of manganese in a manganate?
FAQ
Frequently Asked Questions
No, it is a specialised term used almost exclusively in chemistry.
Manganate (MnO₄²⁻) has manganese in the +6 oxidation state and is typically green. Permanganate (MnO₄⁻) has manganese in the +7 oxidation state and is deep purple.
Yes, potassium manganate (K₂MnO₄) is the most common example, often appearing as a green solid or in green solution.
Manganate ions are unstable in neutral or acidic aqueous solutions, where they disproportionate into permanganate and manganese dioxide.