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Sumario Química Experimental 1º semestre

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Esquemas de las prácticas que incluyen: materiales necesarios, procedimiento, teoría, cálculos de resultados y errores.

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January 1, 2023
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Written in
2022/2023
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PRÁCTICA 8: PRECIPITACIÓN Y CRISTALIZACIÓN


1. 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




-...
-




-
-




-
-

. -
,naa
-




secsuslo
w
i
z Asis enfricer pesar
8C
aal
)
,
.
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