- Neptunium
- Kamus rumus kimia
- Yttrium oxalate
- Yttrium compounds
- Yttrium
- Rare-earth element
- List of yttrium compounds
- Ytterbium(III) oxalate
- Gadolinium(III) oxalate
- Oxalate sulfate
- Kidney stone disease
- Terbium(III) oxalate
Yttrium oxalate GudangMovies21 Rebahinxxi LK21
Yttrium oxalate is an inorganic compound, a salt of yttrium and oxalic acid with the chemical formula Y2(C2O4)3. The compound does not dissolve in water and forms crystalline hydrates—colorless crystals.
Synthesis
Precipitation of soluble yttrium salts with oxalic acid:
2
Y
C
l
3
+
3
H
2
C
2
O
4
→
Y
2
(
C
2
O
4
)
3
↓
+
6
H
C
l
{\displaystyle {\mathsf {2YCl_{3}+3H_{2}C_{2}O_{4}\ {\xrightarrow {}}\ Y_{2}(C_{2}O_{4})_{3}\downarrow +6HCl}}}
Properties
Yttrium oxalate is highly insoluble in water and converts to the oxide when heated. Yttrium oxalate forms crystalline hydrates (colorless crystals) with the formula Y2(C2O4)3•n H2O, where n = 4, 9, and 10.
Decomposes when heated:
Y
2
(
C
2
O
4
)
3
→
700
o
C
Y
2
O
3
+
3
C
O
2
+
3
C
O
{\displaystyle {\mathsf {Y_{2}(C_{2}O_{4})_{3}\ {\xrightarrow {700^{o}C}}\ Y_{2}O_{3}+3CO_{2}+3CO}}}
The solubility product of yttrium oxalate at 25 °C is 5.1 × 10−30.
The trihydrate Y2(C2O4)3•3H2O is formed by heating more hydrated varieties at 110 °C.
Y2(C2O4)3•2H2O, which is formed by heating the decahydrate at 210 °C) forms monoclinic crystals with unit cell dimensions a=9.3811 Å, b=11.638 Å, c=5.9726 Å, β=96.079°.
Related
Several yttrium oxalate double salts are known containing additional cations. Also a mixed-anion compound with carbonate is known.
References
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