Revision:Acid-Base Character of Group 4 Oxides

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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 Acidic

$\mathsf{CO_2 + H_2O \longrightarrow H_2CO_3}$

SiO₂

Acidic

$\mathsf{SiO_2 + 2NaOH \longrightarrow 2Na_2SiO_3 + H_2O}$

SnO and SnO₂

Amphoteric

As an acid: $\mathsf{SnO + 2NaOH + H_2O \longrightarrow Na_2Sn(OH)_4}$

As a base: $\mathsf{SnO + 2HCl \longrightarrow SnCl_2 + H_2O}$

$\mathsf{SnO_2 + 4HCl \longrightarrow SnCl_4 + 2H_2O}$

PbO and PbO₂

Amphoteric

As a base: $\mathsf{PbO + 2HCl \longrightarrow PbCl_2 + H_2O}$

As an acid: $\mathsf{PbO + NaOH + H_2O \longrightarrow Na_2Pb(OH)_4}$

As a base (at room temperature): $\mathsf{PbO_2 + 4HCl \longrightarrow PbCl_2 + Cl_2 + H_2O}$

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Article Updates

Revision:Acid-Base Character of Group 4 Oxides

Down Group 4

Acid Base reactions of Group 4 Oxides

CO2

SiO2

SnO and SnO2

PbO and PbO2

Comments

CO₂

SiO₂

SnO and SnO₂

PbO and PbO₂