Yttrium hydroxide

Yttrium hydroxide
Yttrium hydroxide
Are common
Systematic ; name	Yttrium hydroxide
Traditional names	Yttrium hydroxide
Chem. formula	Y (OH) 3
Physical properties
condition	crystals with a yellowish tint
Molar mass	139.93 g / mol
Density	3.9 g / cm³
Classification
Reg. CAS number	16469-22-0
Reg. EINECS number
Smiles

Yttrium hydroxide is an inorganic compound, yttrium metal hydroxide with the formula Y (OH) ₃ , white crystals with a yellowish tint or an amorphous substance insoluble in water.

Content

Getting

The effect of hot water on metallic yttrium:

{\mathsf {2Y+6H_{2}O\ {\xrightarrow {90^{o}C}}\ 2Y(OH)_{3}\downarrow +3H_{2}\uparrow }}

{\ displaystyle {\ mathsf {2Y + 6H_ {2} O \ {\ xrightarrow {90 ^ {o} C}} \ 2Y (OH) _ {3} \ downarrow + 3H_ {2} \ uparrow}}}

Oxidation of yttrium by oxygen in the presence of water:

{\mathsf {4Y+3O_{2}+6H_{2}O\ {\xrightarrow {}}\ 4Y(OH)_{3}\downarrow }}

{\ displaystyle {\ mathsf {4Y + 3O_ {2} + 6H_ {2} O \ {\ xrightarrow {}} \ 4Y (OH) _ {3} \ downarrow}}}

The effect of superheated water under pressure on yttrium oxide :

{\mathsf {Y_{2}O_{3}+3H_{2}O\ {\xrightarrow {350^{o}C,p}}\ 2Y(OH)_{3}}}

{\ displaystyle {\ mathsf {Y_ {2} O_ {3} + 3H_ {2} O \ {\ xrightarrow {350 ^ {o} C, p}} \ 2Y (OH) _ {3}}}}

The action of alkalis on the soluble salt of yttrium:

{\mathsf {Y(NO_{3})_{3}+3NaOH\ {\xrightarrow {}}\ Y(OH)_{3}\downarrow +3NaNO_{3}}}

{\ displaystyle {\ mathsf {Y (NO_ {3}) _ {3} + 3NaOH \ {\ xrightarrow {}} \ Y (OH) _ {3} \ downarrow + 3NaNO_ {3}}}}

Hydrolysis of yttrium sulfide with hot water:

{\mathsf {Y_{2}S_{3}+6H_{2}O\ {\xrightarrow {100^{o}C}}\ 2Y(OH)_{3}+3H_{2}S\uparrow }}

{\ displaystyle {\ mathsf {Y_ {2} S_ {3} + 6H_ {2} O \ {\ xrightarrow {100 ^ {o} C}} \ 2Y (OH) _ {3} + 3H_ {2} S \ uparrow}}}

Physical Properties

Yttrium hydroxide forms crystals of hexagonal syngony , white with a yellowish tint, space group P 6 ₃ m , cell parameters a = 0.624 nm, c = 0.353 nm, Z = 2.

Not soluble in water, p PR = 24.50.

Chemical Properties

Decomposes on heating:

{\mathsf {2Y(OH)_{3}\ {\xrightarrow {200^{o}C}}\ Y_{2}O_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {2Y (OH) _ {3} \ {\ xrightarrow {200 ^ {o} C}} \ Y_ {2} O_ {3} + 3H_ {2} O}}}

{\mathsf {Y(OH)_{3}\ {\xrightarrow {700^{o}C,p}}\ YO(OH)+H_{2}O}}

{\ displaystyle {\ mathsf {Y (OH) _ {3} \ {\ xrightarrow {700 ^ {o} C, p}} \ YO (OH) + H_ {2} O}}}

Reacts with acids :

{\mathsf {Y(OH)_{3}+3HCl\ {\xrightarrow {}}\ YCl_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {Y (OH) _ {3} + 3HCl \ {\ xrightarrow {}} \ YCl_ {3} + 3H_ {2} O}}}

Reacts with carbon dioxide :

{\mathsf {2Y(OH)_{3}+3CO_{2}\ {\xrightarrow {}}\ Y_{2}(CO_{3})_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {2Y (OH) _ {3} + 3CO_ {2} \ {\ xrightarrow {}} \ Y_ {2} (CO_ {3}) _ {3} + 3H_ {2} O}} }

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5 .
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry, 2000 .-- 480 p. - ISBN 5-7245-1163-0 .
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972. - T. 2. - 871 p.