, Research Paper
Down Group 4 The metallic character increases The +2 oxidation state gets more stable and the +4 oxidation state less
stable Acid Base reactions of Group 4 Oxides CO2 Weakly AcidicCO2 + H2O –>
H2CO3 SiO2 AcidicSiO2 + 2NaOH –> 2Na2SiO3 +
H2O SnO and SnO2 AmphotericAs an acid: SnO + 2NaOH + H2O –>
Na2Sn(OH)4As a base: SnO + 2HCl –>
SnCl2 + H2OSnO2 + 4HCl –>
SnCl4 + 2H2O PbO and PbO2 AmphotericAs a base: PbO + 2HCl –> PbCl2 +
H2OAs an acid: PbO + NaOH + H2O –>
Na2Pb(OH)4 As a base (at room temperature):
PbO2 + 4HCl –> PbCl2 + Cl2 +
H2O
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