Bismuth (II) oxide

Bismuth oxide
Bismuth oxide
Are common
Systematic ; name	Bismuth oxide
Traditional names	Bismuth monoxide
Chem. formula	Bio
Physical properties
condition	gray-black crystals
Molar mass	224.98 g / mol
Density	7.15-7.30 g / cm³
Thermal properties
T. melt.	902 ° C
T. bale.	1647 ° C
Classification
PubChem
Smiles
Inchi
ChemSpider

Bismuth (II) oxide is a binary inorganic compound of bismuth metal and oxygen with the formula BiO, gray-black crystals, slowly reacts with cold water, forms crystalline hydrates .

Content

Getting

Reduction of bismuth (III) oxide by bismuth:

{\mathsf {Bi_{2}O_{3}+Bi\ {\xrightarrow {T}}\ 3BiO}}

{\ displaystyle {\ mathsf {Bi_ {2} O_ {3} + Bi \ {\ xrightarrow {T}} \ 3BiO}}}

or hydrogen:

{\mathsf {Bi_{2}O_{3}+H_{2}\ {\xrightarrow {265^{o}C}}\ 2BiO+H_{2}O}}

{\ displaystyle {\ mathsf {Bi_ {2} O_ {3} + H_ {2} \ {\ xrightarrow {265 ^ {o} C}} \ 2BiO + H_ {2} O}}}

or carbon monoxide :

{\mathsf {Bi_{2}O_{3}+CO\ {\xrightarrow {400^{o}C}}\ 2BiO+CO_{2}}}

{\ displaystyle {\ mathsf {Bi_ {2} O_ {3} + CO \ {\ xrightarrow {400 ^ {o} C}} \ 2BiO + CO_ {2}}}}

Physical Properties

Bismuth (II) oxide forms gray-black crystals.

Crystalline hydrates of the composition BiO • ½H ₂ O and BiO • H ₂ O are known.

Chemical Properties

Oxidized by heating in air:

{\mathsf {4BiO+O_{2}\ {\xrightarrow {180^{o}C}}\ 2Bi_{2}O_{3}}}

{\ displaystyle {\ mathsf {4BiO + O_ {2} \ {\ xrightarrow {180 ^ {o} C}} \ 2Bi_ {2} O_ {3}}}}

Easy to recover to metal:

{\mathsf {BiO+H_{2}\ {\xrightarrow {300^{o}C}}\ 2Bi+H_{2}O}}

{\ displaystyle {\ mathsf {BiO + H_ {2} \ {\ xrightarrow {300 ^ {o} C}} \ 2Bi + H_ {2} O}}}

{\mathsf {BiO+CO\ {\xrightarrow {250^{o}C}}\ 2Bi+CO_{2}}}

{\ displaystyle {\ mathsf {BiO + CO \ {\ xrightarrow {250 ^ {o} C}} \ 2Bi + CO_ {2}}}}

When reacting with acids or acid oxides, it disproportionates :

{\mathsf {3BiO+6HCl\ {\xrightarrow {}}\ 2BiCl_{3}+Bi+3H_{2}O}}

{\ displaystyle {\ mathsf {3BiO + 6HCl \ {\ xrightarrow {}} \ 2BiCl_ {3} + Bi + 3H_ {2} O}}}

{\mathsf {5BiO+CO_{2}\ {\xrightarrow {}}\ 2Bi_{2}O_{3}+Bi+CO}}

{\ displaystyle {\ mathsf {5BiO + CO_ {2} \ {\ xrightarrow {}} \ 2Bi_ {2} O_ {3} + Bi + CO}}}

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1988. - T. 1. - 623 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1971. - T. 1. - 561 p.