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At higher temperatures, the Al 2 Cl 6 dimers dissociate into trigonal planar AlCl 3 monomer, which is structurally analogous to BF 3. The melt conducts electricity poorly, [12] unlike more ionic halides such as sodium chloride. Aluminium chloride monomer belongs to the point group D 3h in its monomeric form and D 2h in its dimeric form.
When a salt of a metal ion, with the generic formula MX n, is dissolved in water, it will dissociate into a cation and anions. [citation needed]+ + (aq) signifies that the ion is aquated, with cations having a chemical formula [M(H 2 O) p] q+ and anions whose state of aquation is generally unknown.
Aluminium trichloride (AlCl 3) has a layered polymeric structure below its melting point of 192.4 °C (378 °F), but transforms on melting to Al 2 Cl 6 dimers with a concomitant increase in volume by 85% and a near-total loss of electrical conductivity
The dissociation of salts by solvation in a solution, such as water, means the separation of the anions and cations. The salt can be recovered by evaporation of the solvent. An electrolyte refers to a substance that contains free ions and can be used as an electrically conductive medium.
A concentrated solution of this strong electrolyte has a lower vapor pressure than that of pure water at the same temperature. Strong acids , strong bases and soluble ionic salts that are not weak acids or weak bases are strong electrolytes.
A metal ion in aqueous solution or aqua ion is a cation, dissolved in water, of chemical formula [M(H 2 O) n] z+.The solvation number, n, determined by a variety of experimental methods is 4 for Li + and Be 2+ and 6 for most elements in periods 3 and 4 of the periodic table.
Ice cubes put in water will start to melt when they reach their melting point of 0 °C. The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium.
Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure , which increases the substance's temperature to the melting point .