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Bischofite is a hydrous magnesium chloride mineral with formula MgCl 2 ·6H 2 O. It belongs to halides and is a sea salt concentrate. It contains many macro- and micro-elements vital for human health, in much higher concentrations than can be found in sea or ocean salt.
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. One derivative is tetraethylammonium tetrachloromagnesate [N(CH 2 CH 3) 4] 2 [MgCl 4]. The adduct MgCl 2 is another. [9]
Carnallite's chemical formula is K Mg Cl 3 ·6(H 2 O). Synthetic carnallite crystal specimens can be produced from 1.5 mole percent KCl and 98.5 mole percent MgCl 2 ·6H 2 O by slow crystallization at 25 °C. [8] Its density is 1.602 g/cm 3. [8] Carnallite can also be produced by grinding the combination of hydrated magnesium chloride and ...
In chemistry, the molar mass (M) (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical compound is defined as the ratio between the mass and the amount of substance (measured in moles) of any sample of the compound. [1] The molar mass is a bulk, not molecular, property of a substance.
For example, water has a molar mass of 18.0153(3) g/mol, but individual water molecules have molecular masses which range between 18.010 564 6863(15) Da (1 H 2 16 O) and 22.027 7364(9) Da (2 H 2 18 O). Atomic and molecular masses are usually reported in daltons, which is defined in terms of the mass of the isotope 12 C (carbon-12).
For gases, departure from 3 R per mole of atoms is generally due to two factors: (1) failure of the higher quantum-energy-spaced vibration modes in gas molecules to be excited at room temperature, and (2) loss of potential energy degree of freedom for small gas molecules, simply because most of their atoms are not bonded maximally in space to ...
Anhydrous MnCl 2 adopts a layered cadmium chloride-like structure. The tetrahydrate consists of octahedral cis-Mn(H 2 O) 4 Cl 2 molecules. The trans isomer, which is metastable, is also known. [4] [5] The dihydrate MnCl 2 (H 2 O) 2 is a coordination polymer. Each Mn center is coordinated to four doubly bridging chloride ligands.
Its fertilizer grade has 10.5% nitrogen and 9.4% magnesium, so it is listed as 10.5-0-0 + 9.4% Mg. Fertilizer blends containing magnesium nitrate also have ammonium nitrate , calcium nitrate , potassium nitrate and micronutrients in most cases; these blends are used in the greenhouse and hydroponics trade.