In chemistry , an
amphoteric species is a molecule or ion that can react as an acid as well as a base The word is derived from the Greek
Kaynak: Amphoterismpartially offsets the effect of its 4d 10 shell Tripositive antimony is
amphoteric; quinquepositive antimony is (predominately) acidic
Kaynak: MetalloidBeryllium hydroxide, Be(OH)2, is an
amphoteric hydroxide , dissolving in both acids and alkali s. Industrially it is produced as a by-
Kaynak: Beryllium hydroxideCocamidopropyl hydroxysultaine (CAHS) is a synthetic
amphoteric surfactant from the hydroxysultaine group. It is found in personal care
Kaynak: Cocamidopropyl hydroxysultaineDisodium cocoamphodiacetate (DSCADA) is a synthetic
amphoteric surfactant routinely used in personal care products. Biodegradability
Kaynak: Disodium cocoamphodiacetateAmphoteric substances: An
amphoteric substance is one that can act as an acid or as a base, depending on pH. Water (above) is
amphoteric.
Kaynak: Acid dissociation constant Beryllium hydroxide Be(OH)2 is
amphoteric The hydroxide itself is insoluble in water, with a solubility product log K* sp of −11.7.
Kaynak: HydroxideIt is a poison ous brown/yellow solid which, because of its high oxidation state , is both an
amphoteric oxide and an oxidizing agent .
Kaynak: Vanadium(V) oxideThis colourless, diamagnetic solid is
amphoteric . Structure: It crystallises with the rutile structure, wherein the tin atoms are six
Kaynak: Tin dioxideThere are also
amphoteric exchangers that are able to exchange both cations and anions simultaneously. However, the simultaneous exchange
Kaynak: Ion exchangeIts name originates from the chemical's
amphoteric properties. Two amphotericins, amphotericin A and amphotericin B are known, but only B
Kaynak: Amphotericin BThe compound is consequently
amphoteric , although it is not usually referred to as an amino-acid as it has more than one carbon
Kaynak: Anthranilic acidprotonates another water molecule to form hydronium , H 3 O+. It is an example of autoprotolysis , and exemplifies the
amphoteric nature of water.
Kaynak: Self-ionization of waterReaction with
amphoteric metals and oxides: Sodium hydroxide slowly reacts with glass to form sodium silicate . Because of this, glass
Kaynak: Sodium hydroxideHydroxide |
amphoteric | basic |
amphoteric | weakly basic | ? | ? | Oxide |
amphoteric | strongly basic |
amphoteric | mildly
Kaynak: Group 12 element