Give 5 examples of acidic oxides
Answers
Answered by
10
Amphoteric/Acidic Metal Oxides:
Many metals form amphoteric oxides or hydroxides. Metal oxides which react with both acids as well as bases to produce salts and water are known as amphoteric oxides.
Beryllium (BeO), Aluminum (Al2O3) , Gallium (Ga2O3), Antimony (Sb2O3 & Sb2O5), Tin (SnO, SnO2), Lead (PbO, PbO2), Zinc (ZnO)--
Be, Al, Ga, Sb, Sn, Pb, Zn are examples of metals that form amphoteric oxides * hydroxides.
Al2O3 +OH– + H2O → [Al (OH)4]– or (AlO2)-
ZnO+NaOH→Na2ZnO2 + H2O
Amphoterism depends on the oxidation states of the oxide as well.
The more electronegative the central atom, the more acidic the oxide. Since the acidity of a cation rises rapidly with charge, d-block elements which exhibit a wide variety of oxidation numbers may have one or more oxides that exhibit only basic properties and one or more oxides that exhibit only acidic properties. The higher the oxidation number the more acidic the corresponding oxide.
Chromium is an example of such an element.
CrO is basic, Cr2O3 is amphoteric and CrO3 is acidic and gives H2CrO4 and H2Cr2O7.
Mn2O7 is acidic & gives HMnO4
In vanadium there is gradual change from the
Basic V2O3 to less basic V2O4 and to amphoteric V2O5.
V2O4 dissolves in acids to give (VO)2+ salts.
V2O5 is, however, amphoteric though mainly acidic and it reacts with alkalies as well as acids to give (VO4)3– as well as VO2+ salts.
MoO3, TeO2, CdO, PtO2 are amphoteric...
please follow me for all your doubts as I am here to help you out
Many metals form amphoteric oxides or hydroxides. Metal oxides which react with both acids as well as bases to produce salts and water are known as amphoteric oxides.
Beryllium (BeO), Aluminum (Al2O3) , Gallium (Ga2O3), Antimony (Sb2O3 & Sb2O5), Tin (SnO, SnO2), Lead (PbO, PbO2), Zinc (ZnO)--
Be, Al, Ga, Sb, Sn, Pb, Zn are examples of metals that form amphoteric oxides * hydroxides.
Al2O3 +OH– + H2O → [Al (OH)4]– or (AlO2)-
ZnO+NaOH→Na2ZnO2 + H2O
Amphoterism depends on the oxidation states of the oxide as well.
The more electronegative the central atom, the more acidic the oxide. Since the acidity of a cation rises rapidly with charge, d-block elements which exhibit a wide variety of oxidation numbers may have one or more oxides that exhibit only basic properties and one or more oxides that exhibit only acidic properties. The higher the oxidation number the more acidic the corresponding oxide.
Chromium is an example of such an element.
CrO is basic, Cr2O3 is amphoteric and CrO3 is acidic and gives H2CrO4 and H2Cr2O7.
Mn2O7 is acidic & gives HMnO4
In vanadium there is gradual change from the
Basic V2O3 to less basic V2O4 and to amphoteric V2O5.
V2O4 dissolves in acids to give (VO)2+ salts.
V2O5 is, however, amphoteric though mainly acidic and it reacts with alkalies as well as acids to give (VO4)3– as well as VO2+ salts.
MoO3, TeO2, CdO, PtO2 are amphoteric...
please follow me for all your doubts as I am here to help you out
Similar questions