[SEGi University]
[Chemical Engineering Lab Practice 1#]
SEGi UNIVERSITY EXTRACTION OF BENZOIC ACID Candidates na!e" Devi#a a$% &aya%a' St(dent ID" SC) *+,-.+ Gr/(% !e!0ers na!e" N/e'ene 1i''ay Is!ai' 2e3t(rer$S(%ervis/r" 2e3t(rer$S( %ervis/r" )r4 Ay!an Ay!an 5i''ia! Date /6 s(0!issi/n" +.$*7$+7
ABSTRACT
T8e /09e3tive /6 t8is e:%eri!ent is t/ deter!ine t8e /vera'' !ass trans6er 3/e66i3ient /6 0en;/i3 a3id 0et
et t8e 3/n3entrati/n and t8is s/'(ti/n t8e s/di(! 8ydr/:ide? NaO@4 T8e a!/(nt /6 s/di(! 8ydr/:ide? NaO@ (sed 6/r ne(tra'i;ed t8is s(66i3ient in6/r!ati/n? t8e avera>e ti!e 6/r /ne dr/%'et and avera>e v/'(!e /6 =* dr/%'ets e v/'(!e /6 a dr/%'et? t8e avera>e radi(s 0y ass(!in> t8e dr/%'et is s%8eri3a' and t8e s(r6a3e area /6 t8e dr/%'et !ass trans6er area4 T/ 3a'3('ate t8e !/'es /6 0en;/i3 a3id trans6erred t/ /ne t8e a(e/(s 3/n3entrati/n /6 0en;/i3 a3id <8i38 8
titrati/n4 T8e 6'(: /6 0en;/i3 a3id
N B
t8r/(>8 t8e dr/%'et inter6a3e
a%%r/%riate e(ati/n4 2ast'y t8e !ass trans6er 3/e66i3ient a's/ t8e s(ita0'e e(ati/n4 Fr/! t8e e:%eri!ent t8e !ass trans6er 3/e66i3ient
va'(e /0tained is
−5 m 1.413 X 10
s
4
INTRODUCTION E:tra3ti/n is a se%arati/n te38ni(e 6re(ent'y (sed in t8e 'a0/rat/ry !ain'y t/ se%arate /ne /r !/re 3/!%/nents 6r/! a !i:t(re4 er/sene Sat(rated
CB
H2O droplet
CB
NB
Fi>(re +4+
Fi>(re +4+ s8/ra! /6 a dr/% /6 t8r/(>8 #er/sene sat(rated trans6erred a3r/ss t8e dr/%'et inter6a3e int/ t8e 8 t8e inter6a3e? N B !/'$!s 3an 0e s8/
NB H C
−C B
58ere CB is t8e 3/n3entrati/n /6 0en;/i3 a3id in #er/sene at sat(rati/n C B
is t8e avera>e 3/n3entrati/n /6 0en;/i3 a3id in t8e a(e/(s %8ase
C is t8e !ass trans6er 3/e66i3ient4 C B
In /rder t/ deter!ine C? t8e va'(e 6/r N B? CB and
!(st 0e #n/
e:%eri!ent is desi>ned t/ deter!ine C4 In t8is e:%eri!ent? a>ent4 A si!%'e e:tra3ti/n %r/3ess in t8is e:%eri!ent e:%'ains t8at sat(rated #er/sene %(ri6ied4 58en t8e re!/ved4 T8e rate /6 0en;/i3 a3id trans6erred 6r/! #er/sene t/ t8e a(e/(s %8ase t8e 0(rette? t8e ti!e /6 trave' and t8e si;e /6 t8e dr/%'ets
A11ARATUS + C/ni3a' 6'as# 1aste(r %i%ette . B(rette 7 Stirrer = Dr/%%er J Bea#er K Stand and 3'a! - Fi'ter 6(nne' , er/sene +* 5ater ++ Ben;/i3 a3id4
1ROCEDURES
1ROCEDURES T8e e:%eri!enta' %r/3ed(re is as 6/''/
T8e +** !' 0(rette
4
A 1aste(r %i%ette
.4
T8e %i%ette
74
1i%ette 'e dr/%'ets at a steady strea! 0y !aintainin> e(a' si;e /6 t8e dr/%'ets and t8e dr/%'ets
=4
Ste% +7
J4
A(e/(s 'ayer
K4
T8e 'eve' /6 t8e #er/sene'y4
-4
=* dr/%'ets ain
,4
Ste% K- e? t8ere6/re t8ree readin>s
+*4
Ti!e 6/r a dr/%'et t/ trave' 6r/! t8e air#er/sene inter6a3e t/ t8e 0/tt/! /6 t8e 3/'(!n
++4
Ste%s K-
+4
* !' /6 t8e a(e/(s s/'(ti/n
+.4
+* !' /6 t8e #er/sene sat(rated et8er
RESU2TS i4 Ti!e ta#en 6/r +* dr/%'ets
i
Droplets
Time taken , t(s)
+
=4J
=4+
.
=4*
7
74,*
=
74JK
J
=4.*
K
74.K
-
=4-*
,
747
+*
74==
Ta0'e 6/r 0en;/i3 a3id 3/n3entrati/n in t8e a(e/(s s/'(ti/n Ste% +
N/
Vi !'
V6 !'
+
*4+
-4+
V6Vi !' -4*
-4+
+=4-
K4K
.
+=4-
74J
-4V avg=
8.0
+ 7.7 + 8.8 3
V avg= 8.17 ml X
=8.17 ml
1 L 1000 ml −6
X
1m
1000 L
3
V avg= 8.17 X 10 m
3
i4
Ta0'e 6/r 0en;/i3 a3id 3/n3entrati/n in #er/sene at sat(rati/n Ste% +.
N/
Vi !'
V6 !'
+
*4+
774+
V6Vi !' 7.4,
*4*
774+
774+
.
*4*
774*
774*
V avg=
43.9
+ 44.1 +44.1 3
V avg= 44.03 ml X
= 44.03 ml
1 L 1000 ml
−5
X
1m
3
1000 L
3
V avg= 4.40 X 10 m
ii4
C/n3entrati/n /6 =* dr/%'ets
N/
Vi !'
V6 !'
+
+**4*
,K4,
ViV6 !' 2.1
,K4,
,=4,
2.0
.
,=4,
,.4=
2.4
AVG =¿
+
2.1 2.0
+ 2.4
3
V ¿ avg =¿ 2.167 ml V ¿
CA2CU2ATIONS a Avera>e ti!e trave''ed 6/r ea38 dr/%'et?
¿
50.04 10
¿ 5.004 S
≅
5S
0 Avera>e v/'(!e 6/r =* dr/%'ets?
¿ 2.1
+ 2.0 + 2.4 3
¿
6.5 3
¿ 2.167 ml
3 Avera>e v/'(!e /6 a dr/%'et?
¿
2.167 50
¿ 0.0434 ml 3
Converting ml ¿ m ,
¿ 0.0434
ml∗1 L ∗1 m3 1000 ml 1000 L
¿ 4.34 X 10− m 8
3
d Avera>e s(r6a3e area /6 t8e dr/%'et !ass trans6er area?
V =
4 3
πr
3
−8 4.34 X 10
4
= πr
3
3
−3
r = 2.17 X 10 m e T8e s(r6a3e area /6 t8e dr/%'et? 2 A = 4 π r
¿ 4 π ( 2.18 X 10− ) 3
¿ 5.92 X 10− m 5
2
6 C/n3entrati/n /6 0en;/i3 a3id in a(e/(s s/'(ti/nCB NaOH + C J@=COO@ →C J@=COONa L @O AH NaO@
BH
C J
@=COO@
)AVAH )BVB M B V B M A= V A
M A= 0.03 M −6
3
V A =8.17 X 10 m V B =10 ml X
1 L 1000 ml
X
1m
3
1000 L
=1 X 10− m 5
3
¿
C B = M B=
¿
M A V A V B
−6 0.03 X 8.17 X 10 −5 1 X 10
(
)
¿ 0.132 M
)AVAH )BVB M B V B M A= V A
M A= 0.03 M −5
V A =4.4 X 10 m
V B =20 ml X
¿
C B = M B=
¿
3
1 L 1000 ml
X
1m
3
1000 L
=2 X 10−
5
3
m
M A V A V B
−5 0.03 4 X 10 −5 2 X 10
(
)
¿ 0. *+)
(
−8
n =( 0.012 ) 4.3 X 10
)=5.27 X 10−
10
moles of benzoicaci transferre N B =¿ onero!let of "ater
¿
−10 5.27 X 10 −5 5.92 X 10 5
(
)( )
¿ 1.78 X 10− ´ B= C
6
( C B + C B , initial ) 2
2
mols / m s
¿
( masstransfer area )( time of travel )
¿
0.012
+0
2
¿ 0.006 M # C =
¿
N B
´B C B −C ¿
1.78 X 10
−6
( 0.132 −0.006 )
¿ 1.413 X 10−
5
m s
DISCUSSION A33/rdin> t/ t8e !ass 6'(: 6/r!('a? !ass 6'(: is inverse'y %r/%/rti/na' t/ !ass trans6er area4 Fr/! t8e e:%eri!ent it 3an 0e seen 3'ear'y t8at t8e 38an>es in t8e dia!eter /6 t8e dr/%'et? e66e3ts t8e !ass trans6er area 0et
CONC2USION Fr/! t8e e:%eri!ent t8e !ass trans6er 3/e66i3ient
s
4 58en t8e e:%eri!ent
!ay /33(rred 6r/! 8(!an s/(r3e 6/r e:a!%'e? err/r in !eas(rin> dr/%'ets? err/r in re3/rdin> t8e ti!e? 3/nsisten3y /6 t8e si;es /6 ea38 dr/%'et s(ee;ed and t8e %/siti/n /6 %i%ette <8en s(ee;in> t8e dr/%'et4 T8is e:%eri!ent is a%%'i3a0'e in ind(stry 6/r t8e e:tra3ti/n /6 s/'(ti/n4
REFFERENCES + E:tra3ti/n /6 Ben;/i3 A3id 2a0 Re%/rt4 *+74 Extraction of Benzoic Acid Lab Report 4 [ON2INE] Avai'a0'e at"8tt%"$$<<<4s3ri0d43/!$d/3$=+J.=*.$E:tra3ti/n/6Ben;/i3 A3id2a0Re%/rt4
2) 2a0/tary 8and 0//#
