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Why Oxides of elements in the centre of the periodic table are amphoteric (e.g., Al2O3, As2O3) or neutral (e.g., CO, NO, N2O). Amphoteric oxides behave as acidic with bases and as basic with acids, whereas neutral oxides have no acidic or basic properties.

Why Oxides of elements in the
centre of the periodic table are amphoteric (e.g., Al2O3, As2O3) or
neutral (e.g., CO, NO, N2O). Amphoteric oxides
behave as acidic with bases and as basic with
acids, whereas neutral oxides have no acidic
or basic properties.

Grade:12th pass

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
Basic oxides are those that react with H+ ion to form a salt and water whereas Acidic oxides are those that react with OH- ion to form a salt and water. We know metals form basic oxide and non metals form acidic oxide.In other words

Amphoteric oxides are able to react with both H+ and OH- and such compounds are usually found as oxides of elements located near the middle of the periodic table. These elements typically exhibit some properties of metals as well as some of non-metals. Thus they have sufficient ionic character for their oxides to react with H+ but also the ability to form covalent bonds to the O atoms of OH- ions.

eg:-PbO +2H+ -----Pb+2 +H2O
PbO +OH- +2H2O------Pb(OH)4]^2-

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