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Many metals (such as zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. Aluminium oxide (Al 2 O 3) is an example of an amphoteric oxide. Amphoterism depends on the oxidation states of the oxide. Amphoteric oxides include lead(II) oxide and zinc oxide, among many others. [2]
Antimony also forms a mixed-valence oxide, antimony tetroxide (Sb 2 O 4), which features both Sb(III) and Sb(V). [26] Unlike oxides of phosphorus and arsenic, these oxides are amphoteric, do not form well-defined oxoacids, and react with acids to form antimony salts. Antimonous acid Sb(OH) 3 is unknown, but the conjugate base sodium antimonite ...
Antimony(III) oxide is an amphoteric oxide. It dissolves in aqueous sodium hydroxide solution to give the meta-antimonite NaSbO 2, which can be isolated as the trihydrate. Antimony(III) oxide also dissolves in concentrated mineral acids to give the corresponding salts, which hydrolyzes upon dilution with water. [7]
The oxide in its preferred oxidation state (As 2 O 3, +3) is amphoteric, [n 16] as is the corresponding oxoacid in aqueous solution (H 3 AsO 3) and congener sulfide (As 2 S 3). Arsenic forms a series of anionic arsenates such as Na 3 AsO 3 and PbHAsO 4, and Zintl phases such as Na 3 As, Ca 2 As and SrAs 3. Antimony is a soft (MH 3.0) and ...
The common oxide of arsenic (As 2 O 3) is acidic but weakly amphoteric. Antimony, showing its brilliant lustre. Antimony is a silver-white solid with a blue tint and a brilliant lustre. It is stable in air and moisture at room temperature. Antimony has a density of 6.697 g/cm 3, and is moderately hard (MH 3.0; about the same as copper). It has ...
China is also the biggest producer of processed antimony, including antimony trioxide (ATO), which is traditionally used in flame retardants and increasingly as a clarifying agent in solar glass.
The limits, effective from Sept. 15, apply to six kinds of antimony-related products, including antimony ore, antimony metals and antimony oxide, the ministry said in a statement.
The oxide Sb 2 O 3 is polymeric, [268] amphoteric, [377] and a glass former. [275] Antimony has an extensive organometallic chemistry (see Organoantimony chemistry ). [ 378 ]