hydrate
Let an agent explain hydrates and their nomenclature, relay water of crystallisation, dehydration and gas hydrates from chemistry references, describe common examples and uses, and distinguish hydrates from hydroxides, hydrides and simple aqueous solutions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain hydrates and their nomenclature, relay water of crystallisation, dehydration and gas hydrates from chemistry references, describe common examples and uses, and distinguish hydrates from hydroxides, hydrides and simple aqueous solutions.
A substance that contains water or its constituent elements in a definite ratio, most often a crystalline solid in which water molecules are bound within the structure, named by prefixes such as monohydrate, dihydrate, tetrahydrate, pentahydrate and heptahydrate, as in sodium chromate tetrahydrate, calcium chromate dihydrate, sodium hypochlorite pentahydrate and sodium sulfite heptahydrate; hydrates lose water on heating to give anhydrous forms, and the term also covers gas hydrates such as methane clathrate and organic hydrates.
What it is for: Not applicable; a class of compounds.
It can be explain nomenclature; relay water of crystallisation; describe examples; distinguish related terms.
Distinguishing features
Fixed water ratio
Water of crystallisation
Reversible dehydration
Prefix nomenclature
What it looks like
Crystalline solids, often coloured differently from anhydrous forms.
Physical character
copper sulfate pentahydrate water: 36.1 percent - by mass
methane hydrate: about 1 CH4 per 5.75 H2O ratio - ideal
How it is recognised
Compound containing bound water
Monohydrates to heptahydrates, chromate hydrates, hypochlorite pentahydrate, gas hydrates
Hydroxides contain OH groups; hydrides contain hydrogen anions; solutions are not fixed ratios
Related models
is a kind of - in registry terms
contains - in its structure
yields - on heating
includes - as gas hydrates
In practice
Families and kinds
inorganic salt hydrates such as chromate, sulfate and chloride hydrates
sodium hypochlorite pentahydrate and sodium sulfite heptahydrate
gas hydrates or clathrates
organic hydrates such as chloral hydrate
hydrated minerals such as gypsum
Standards and regulation
IUPAC nomenclature for hydrates
Chemical safety rules for reactive hydrates such as hypochlorite pentahydrate
Failure modes and hazards
Confusing hydrates with hydroxides or hydrides
Miscalculating mass when ignoring water content
Hazards of chromate hydrates, which are toxic and carcinogenic
Also called
+169
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.hydrate
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a hydrate is.
Science.
Definition
Definition and naming.
Definition
Definition.
- What is a hydrate, and how are mono-, di-, tetra-, penta- and heptahydrates named? definition
- Is the question about a hydrate, a hydroxide, a hydride or an aqueous solution? boundary
Structure
Structure.
Structure
Structure.
- How is water bound in hydrate crystals, and how do gas hydrates differ? definition
- Which entry fits the specific hydrate? action
Measure Measurement.
Practice.
Dehydration
Dehydration.
Dehydration
Dehydration.
- How is water content determined by heating and thermogravimetry, and how are hydrates converted to anhydrous forms? action
- Which references are standard? provenance
Calculation
Calculation.
Calculation
Calculation.
- How is the formula of a hydrate calculated from mass loss? measurement
- Which sources are cited? provenance
Apply Uses.
Application.
Industry
Industry.
Industry
Industry.
- How are hydrates such as sodium hypochlorite pentahydrate, sodium sulfite heptahydrate and chromate hydrates used? provenance
- Which entry fits the specific compound? action
Energy
Gas hydrates.
Energy
Energy.
- What are methane hydrates, and why do they matter for energy and pipelines? provenance
- Which entry fits methane clathrate? action
Context Safety and history.
Context.
Safety
Safety.
Safety
Safety.
- What hazards do chromate hydrates and reactive hydrates pose? provenance
- Which entry fits chromate toxicity? action
History
History.
History
History.
- How was water of crystallisation understood historically? provenance
- Which entry fits the history of chemistry? action
What the second pass must settle
- Should water of crystallisation and clathrate hydrate be separate entries?
- How should chemistry references be linked?
- The registry entry has merged aliases naming specific hydrates; should they be split off?