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A colorful example is cobalt(II) chloride, which turns from blue to red upon hydration, and can therefore be used as a water indicator.. The notation "hydrated compound⋅n H 2 O", where n is the number of water molecules per formula unit of the salt, is commonly used to show that a salt is hydrated.
The most common is the heptahydrate MgSO 4 ·7H 2 O, [1] known as Epsom salt, which is a household chemical with many traditional uses, including bath salts. [ 2 ] The main use of magnesium sulfate is in agriculture, to correct soils deficient in magnesium (an essential plant nutrient because of the role of magnesium in chlorophyll and ...
Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range of salts with the formula Fe SO 4 ·xH 2 O. These compounds exist most commonly as the heptahydrate (x = 7) but several values for x are known.
The heptahydrate is isostructural with ferrous sulfate heptahydrate. The solid consists of [Zn(H 2 O) 6] 2+ ions interacting with sulfate and one water of crystallization by hydrogen bonds. Anhydrous zinc sulfate is isomorphous with anhydrous copper(II) sulfate. It exists as the mineral zincosite. [15] A monohydrate is known. [16]
disodium phosphate (anhydrous) Na 2 HPO 4: 7558–79–4 disodium phosphate dihydrate: Na 2 HPO 4 ·2H 2 O: 10028-24-7 disodium phosphate heptahydrate: Na 2 HPO 4 ·7H 2 O: 7782–85–6 disodium phosphate octahydrate: Na 2 HPO 4 ·8H 2 O: disodium phosphate dodecahydrate: Na 2 HPO 4 ·12H 2 O: 10039–32–4 trisodium phosphate (anhydrous ...
Cobalt(II) sulfate heptahydrate. Cobalt(II) sulfate is any of the inorganic compounds with the formula CoSO 4 (H 2 O) x. Usually cobalt sulfate refers to the hexa- or heptahydrates CoSO 4. 6H 2 O or CoSO 4. 7H 2 O, respectively. [1] The heptahydrate is a red solid that is soluble in water and methanol.
Sodium sulfite is primarily used as a mild reducing agent. The heptahydrate crystals effloresce in warm dry air. Heptahydrate crystals also oxidize in air to form sodium sulfate. The anhydrous form is more resistant to oxidation by air. [7]
Anhydrous MgCl 2 is produced industrially by heating the complex salt named hexamminemagnesium dichloride [Mg(NH 3) 6] 2+ (Cl −) 2. [2] The thermal dehydration of the hydrates MgCl 2 ·nH 2 O (n = 6, 12) does not occur straightforwardly. [8] As suggested by the existence of hydrates, anhydrous MgCl 2 is a Lewis acid, although a weak one.