barium oxide
C2Technical/Scientific
Definition
Meaning
A white, solid, inorganic chemical compound with the formula BaO, formed from barium and oxygen.
A reactive compound used industrially as a precursor to other barium compounds, in cathode ray tubes, and historically in the production of oxygen. It reacts exothermically with water to form barium hydroxide.
Linguistics
Semantic Notes
The term is a compound noun naming a specific chemical substance. It belongs to the semantic field of chemistry, specifically inorganic compounds and metal oxides. It is a hyponym of 'oxide' and 'barium compound'.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation differences follow standard UK/US patterns for the constituent words 'barium' and 'oxide'.
Connotations
None beyond its technical/scientific meaning.
Frequency
Equally rare in general discourse in both varieties, used exclusively in technical contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Barium oxide] + [verb] + [object][Subject] + [verb] + [barium oxide] + [prepositional phrase][Barium oxide] + [preposition] + [noun]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Rare, except in procurement or safety documentation for chemical suppliers or glass/ceramics manufacturers.
Academic
Common in chemistry, materials science, and chemical engineering textbooks, research papers, and lab reports.
Everyday
Virtually never used.
Technical
The primary register. Used in chemical synthesis descriptions, material safety data sheets (MSDS), industrial process guides, and technical specifications.
Examples
By Part of Speech
adjective
British English
- The barium oxide residue was carefully disposed of.
- A barium oxide coating was applied to the substrate.
American English
- The barium oxide residue was carefully disposed of.
- A barium oxide coating was applied to the substrate.
Examples
By CEFR Level
- Barium oxide is a white powder used in making certain types of glass.
- The chemist warned that barium oxide can be toxic if inhaled.
- The industrial synthesis of barium oxide typically involves heating barium carbonate in the absence of air.
- Due to its hygroscopic nature, barium oxide must be stored in a moisture-free environment to prevent conversion to the hydroxide.
Learning
Memory Aids
Mnemonic
Think: Barium (Ba) from the periodic table + Oxide (O) from oxygen. It's a 'Ba-O' partnership.
Conceptual Metaphor
N/A (Highly technical term not typically subject to metaphorical extension).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'oxide' as оксид and then add a Russian genitive ending to 'barium'. The correct term is 'оксид бария' (oksid bariya), where 'бария' is in the genitive case.
Common Mistakes
- Misspelling as 'barium oxcide' or 'baryum oxide'. Confusing it with 'barium sulfate' or 'barium peroxide'. Using it as a countable noun (e.g., 'a barium oxide') instead of an uncountable mass noun.
Practice
Quiz
What is the primary industrial use of barium oxide?
FAQ
Frequently Asked Questions
Yes, it is corrosive and toxic. It reacts violently with water and can cause severe burns. It is harmful if inhaled or ingested and requires careful handling with appropriate personal protective equipment.
Barium oxide (BaO) contains one oxygen atom per barium atom, while barium peroxide (BaO₂) contains two. Barium peroxide can be formed by further oxidation of barium oxide and has different chemical properties.
No, barium oxide is not found naturally. It is a manufactured compound. The element barium is found in minerals like barite (barium sulfate) and witherite (barium carbonate), from which barium oxide is produced industrially.
Historically, a coating of barium oxide was used on the hot cathode filaments to lower their work function, making it easier for electrons to be emitted, which is essential for the tube's operation.