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An equivalent (symbol: officially equiv; [1] unofficially but often Eq [2]) is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of another substance in a given chemical reaction. It is an archaic quantity that was used in chemistry and the biological sciences (see Equivalent weight § In ...
For example, sulfuric acid (H 2 SO 4) is a diprotic acid. Since only 0.5 mol of H 2 SO 4 are needed to neutralize 1 mol of OH −, the equivalence factor is: f eq (H 2 SO 4) = 0.5. If the concentration of a sulfuric acid solution is c(H 2 SO 4) = 1 mol/L, then its normality is 2 N. It can also be called a "2 normal" solution.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
In chemistry, equivalent weight (also known as gram equivalent [1] or equivalent mass) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance.
2 O (l) → Ca 2+ (aq) + Mg(OH) 2 (s) The hydroxide is then converted to magnesium chloride by treatment with hydrochloric acid and heating of the product to eliminate water: Mg(OH) 2 + 2 HCl → MgCl 2 + 2 H 2 O. The salt is then electrolyzed in the molten state. At the cathode, the Mg 2+ ion is reduced by two electrons to magnesium metal: Mg ...
The process first forms silicon metal and magnesium oxide, and, if an excess of SiO 2 is used, then elemental silicon is formed: 2 Mg + SiO 2 → 2 MgO + Si. If an excess of Mg is present, Mg 2 Si is formed from the reaction of the remaining magnesium with the silicon: 2 Mg + Si → Mg 2 Si. These reactions proceed exothermically, [4] even ...
Again, the motive here was to standardize educational outputs and faculty workloads. Cooke established the collegiate Student Hour as "an hour of lecture, of lab work, or of recitation room work, for a single pupil" [3] per week (1/5 of the Carnegie Unit's 5-hour week), during a single semester (or 15 weeks, 1/2 of the Carnegie Unit's 30-week ...
Group 2 organometallic chemistry refers to the organic derivativess of any group 2 element. It is a subtheme to main group organometallic chemistry . [ 2 ] [ 3 ] By far the most common group 2 organometallic compounds are the magnesium-containing Grignard reagents which are widely used in organic chemistry .