decahydrate
Very LowTechnical/Scientific
Definition
Meaning
A chemical compound containing ten molecules of water per unit of the compound, typically in its crystal structure.
Less commonly, to cause a substance to combine with ten molecules of water; to form a decahydrate. Primarily used in chemistry and materials science.
Linguistics
Semantic Notes
Strictly a chemical term. Refers to a specific stoichiometric hydration state. It is not used metaphorically or in general language.
Dialectal Variation
British vs American Usage
Differences
No differences in meaning or usage. Spelling and pronunciation follow standard regional patterns.
Connotations
None beyond its technical meaning.
Frequency
Equally rare in both scientific registers.
Vocabulary
Collocations
Grammar
Valency Patterns
[Chemical Name] decahydratethe decahydrate of [Chemical Name]Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used exclusively in chemistry, geology, and materials science papers and textbooks.
Everyday
Never used.
Technical
The primary context. Used to specify the exact hydration state of a crystalline substance.
Examples
By Part of Speech
verb
British English
- The salt will decahydrate under those specific conditions of temperature and humidity.
- We attempted to decahydrate the compound for the experiment.
American English
- The compound can decahydrate if left in a saturated atmosphere.
- They managed to decahydrate the sample in the lab.
adjective
British English
- The decahydrate form is the one commonly found in household washing soda.
- We analysed the decahydrate crystals.
American English
- The decahydrate phase is stable at room temperature.
- They purchased the decahydrate salt for the reaction.
Examples
By CEFR Level
- Washing soda is actually sodium carbonate decahydrate.
- Some minerals exist naturally in a decahydrate state.
- The team successfully isolated the elusive decahydrate of the compound, which had only been predicted computationally.
- Upon cooling, the solution yielded the decahydrate rather than the expected pentahydrate, altering its physical properties significantly.
Learning
Memory Aids
Mnemonic
Think 'DECA' (like decade, meaning ten) + 'HYDRATE' (water). A decahydrate holds ten water molecules.
Conceptual Metaphor
None applicable.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct calque 'декагидрат' is understood but the standard Russian chemical term is often 'десятиводный' (e.g., десятиводный сульфат натрия).
Common Mistakes
- Mispronouncing as 'deca-hy-drate' (four syllables) instead of 'deca-hy-drate' (five syllables: dek-uh-hy-drayt).
- Confusing with other hydrates (monohydrate, pentahydrate).
- Using in non-chemical contexts.
Practice
Quiz
What does the prefix 'deca-' in 'decahydrate' signify?
FAQ
Frequently Asked Questions
No, it is a very low-frequency technical term used almost exclusively in chemistry and related sciences.
Yes, though extremely rare. It means to combine with ten molecules of water or to form a decahydrate.
Sodium sulfate decahydrate (Na₂SO₄·10H₂O), also known as Glauber's salt, is a common example.
It is pronounced in five syllables: dek-uh-HY-drayt. The stress is on the third syllable ('HY').