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Sumario Química Experimental 1º semestre
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- Institution
Esquemas de las prácticas que incluyen: materiales necesarios, procedimiento, teoría, cálculos de resultados y errores.
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PRÁCTICA 8: PRECIPITACIÓN Y CRISTALIZACIÓN1. PRECIPITACIÓN
Reacción de precipitación:
sobrenodantecerspension dicolil
,
prcinitado
Bakla Cascl +
H - BaSO ( + 2 Caa
]
HCl
s)
,
2SDyCac)
Equilibrio de solubilidad:
Ba ( 504" Producto de solubilidad (cte. de equilibrio Kps)
+
Basou ( F Bas Laq -3 +
(
3
s3
ag)
aq)
5On
Ej: Ag (51 71 Caq 2 C Cacs Kps = 8100.101
03?
Ag2CO,
Agtsaas+
)-3
2CD3
Producto iónico: [ Condición de equilibrio: Q
AgtJ.LCOjZJ
=Fps
(Cociente de reacción Q)
[l
0"
QDFps
hasta Q = Rps
AgtJTCDzzJz8'00.
-1X
Evolución si Q -
equilibrio de solubilidad disol Saturada
.
?KpS
,
QfKPS -3 disol insarturadsn Residuos: Ba
,
+3
CT
Experimento: 5'0 Balla Cas ->
BaT
?Caa]
mL
SEPARACIÓN
,0'20M
)
2
Hg0+
5'0 4'20 S
i Filtrado i Simple I
Eac +2
Centrifugación I
H
0û"
{ Sedimentación Decantación
H20
7 t
M
)
mL,
2SOy
i
Sedimentar
Mezclar, agitar, dividir en 2 A vacío
Centrifugar
2. CRISTALIZACIÓN (PARA PURIFICACIÓN)
i
mporetas
purificar insolubles
solobles
ComB a
.
î î
!
ASCSJ NaClss Ls PESAR
19
:
)
II
i
),
waşı
i Asic 41 4
ü
-
+Hnl
3s
Ccorpwes to C
-
--
-
-
55
-
Nacs Fboml IIC - Bö
- so
-
- - -
wnv Ab Impurezas solubles 1751
filtracko 2'2
o
3'0 -
l
-
Disolverte 13
'o
simple t
-
filtro filtrado
-
V -
- -
i
- -
-
-
-
- -
-
- - -
h
~
óo
% oi
bo 5
II bo
!--.!
5sJ
ff
ios
-
'""
-
."
fanct
o
As - .,
Walc
-
--
-
-
- -
enfriconiento cristalizacion
c
{
Astis Elegir D solubilidaal solubilidad (753
=
Nuctloc Astacl
:
a)
-
,
-
-
-
-
filtrado
filtro
vaco filtrando
Astclittio
Waccacascas
-...
-
-
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-
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i
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