pentahydrate
Noun (Chemistry): A "pentahydrate" is a chemical compound that contains five molecules of water of crystallization per molecule of the substance. It is a type of hydrate where the water molecules are chemically bonded within the crystal structure.
- (A compound with five water molecules attached to copper sulfate.)
- (The chemical notation indicating five water molecules per formula unit.)
"Anhydrous vs. pentahydrate": The pentahydrate form of a compound often differs in color, solubility, and stability from its anhydrous (water-free) form.
- When heated, the blue copper sulfate pentahydrate loses its water and turns into a white anhydrous powder. (The removal of water molecules changes the appearance.)
"Pentahydrate in industrial applications": Many pentahydrates are used in agriculture or manufacturing due to their specific hydration properties.
- Magnesium sulfate pentahydrate is used as a fertilizer to provide essential nutrients to crops. (The hydrated form aids in nutrient delivery.)
Hydrate (n): a compound containing water molecules bonded within its crystal structure.
- A hydrate can have one or more water molecules; a pentahydrate has exactly five.
Anhydrous (adj): describing a compound without water of crystallization.
- The anhydrous form of the salt is more reactive than the pentahydrate.
Pentahydrated (adj): containing five water molecules (less common, synonymous with pentahydrate).
- The pentahydrated crystal structure is stable at room temperature.
- Five-water hydrate: a descriptive term for a compound with five water molecules.
- Chemists often refer to pentahydrate as a five-water hydrate for clarity.
- "Water of crystallization": the water molecules that are part of the crystal structure of a hydrate.
- In a pentahydrate, the water of crystallization accounts for a specific percentage of the total mass. (The water is chemically bound, not simply absorbed.)