| 释义 |
hemihydrate
hem·i·hy·drate H0144000 (hĕm′ĭ-hī′drāt′)n. A hydrate in which the molecular ratio of water molecules to anhydrous compound is 1:2.
hem′i·hy′drat′ed adj.hemihydrate (ˌhɛmɪˈhaɪdreɪt) n (Chemistry) chem a hydrate in which there are two molecules of substance to every molecule of water ˌhemiˈhydrated adjhem•i•hy•drate (ˌhɛm ɪˈhaɪ dreɪt)
n. a hydrate in which there are two molecules of the compound for each molecule of water. [1905–10] hemihydrate
hemihydrate[‚hem·ē′hī‚drate] (organic chemistry) A hydrate with a 2:1 molecular ratio of anhydrous compound to water, plaster of paris is the hemihydrate of calcium sulfate, composition CaSO4·½H2O. hemihydrateA hydrate which contains one-half molecule of water to one molecule of the compound; the most common such material is partially dehydrated gypsum (plaster of paris).hemihydrate
hemihydrate (hĕm″ē-hī′drāt) A chemical compound with one molecule of water for every two molecules of the other substance. In dentistry, calcium sulfate hemihydrate is mixed with water to produce a hardened plaster or stone (calcium sulfate dihydrate), which, in turn, is commonly used to produce dental models. |