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82, , , , , Concepts of Chemistry, , , , = SO, + OF, = Ca* + 0?, , concept, a bi, ticularly useful to hig!, , so? =, CaO =, Hence according to the, This view is par, , nd metallurgy., asic oxides (CaO, PbO) and acidic oxides, , or and acid is an oxide ion, ture chemistry, as in the, , (SO,, SiO,), , ase is an oxide don, acceptor. h tempera, , fields of ceramics a, In the following reactions b, , are reacting to form salts., CaO + SiO, CaSiO,, PbO +SO,— PbSO., , Furthermore, according to this theory amphoteric substances are those which, show both a tendency to take up or give up oxide ions depending upon the, circumstances, i.e. in the following ZnO acts as acid., , Na,O + ZnO > 2Na* + ZnO,”, “a ZnO + CuO — Zn? + CuO,, e oxide transfer picture due to Lux can be ext, seiaaae Gemenite cto: ended to any negative ion, i.e,, 3 NaF + AIF, ““— 3 Nat+AlF,*, + temperature 6, e Lux-flood definition c i, nhide anole an be extended to include transfer of any anion e.g.,, e Lewi : z, Soret ements cet, a os, white 4 e that has an unshared, pi — — a coon bond with an atom, molecule, io —, base, An acid an form a co-ordinate bond by accepting an electr eae, : must have a vacant orbital into which an el on pair from a, nee can be accommodated, wh n electron pair donated by a, or example, NH, contains one }, gee one, a as a capacity to donate it and forms ee Minden atom. f, ompound it can accept a lone pai rordinate bond BF, is electron difi, is a Lewis acid pair.of electron to form a co-ordi a, cid, oe nate bond. Hence it, , , , , Acid (acceptor) Base ( ig ), , (Plectranhile) (is