LAPORAN PRAKTIKUM KIMIA ANORGANIK ANORGANIK 1 PEMBUATAN PEMBUATAN KAl(SO KA l(SO4)2.12H2O
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LABORATORIUM KIMIA ANORGANIK $AKULTAS MATEMATIKA 3AN ILMU PENGETAHUAN ALAM UNIERSITAS NEGERI PA3ANG 214
DAFTAR ISI Contents LAPORAN PRAKTIKUM KIMIA ANORGANIK 1 .................................................................1
DAFTAR ISI.................................................................................................................. 2 PEMBUATAN KAl(SO 4)2.12H2O.........................................................................................2
TUJUAN....................................................................................................................... 2 TEORI DASAR.............................................................................................................. 2 ALAT DAN BAHAN....................................................................................................... 4 PROSE3UR KER9A........................................................................................................ 5 TABLE PENGAMATAN ................................................................................................... 5 7* K 2SO4 %l#ru"#n %#l#- -l #r .................................................................................5
PERHITUNGAN............................................................................................................ 6 PEMBAHASAN............................................................................................................. 6
KESIMPULAN............................................................................................................... 7 JAWABAN PERTANYAAN............................................................................................... 8 DAFTAR PUSTAKA........................................................................................................ 9
PEMBUATAN KAl(SO4)2.12H2O
TUJUAN 1. Me-#0#- 8e8er## #se" "-# en#n unsure Alu-nu2. Me-8u# #;#s
TEORI DASAR Se#n<#rn se<#r#0 er#%#8#n -#nus#7 seny#;# #lu-nu- su%#0 %un#"#n % 8er8## 8%#n. T#n#0 l# #%# %#s#rny# #%#l#0 0%r# #lu-nu- sl"# %#n e-8"#r su%#0 %"en#l se<#" #0un y#n l#lu. T#;#s (#lu-nu- "#lu- sul6#) AlK(SO 4)2 su%#0 %un#"#n %8%#n ,8#=,8##n %#n en&elu#n e"sl sel#-# "ur#n le80 4 #0un. Alu-nu- #%#l#0 l,#- y#n rn#n s#8l %u%#r#7 -u%#0 %8u#7 "u# %#n #0#n er0#%# ",r,s. 3#n#r# l,#- ,l,n#n III (B,r,n=Alu-nu- ). Alu-nu- #%#l#0 l,#- erenn. Ber%#s#r#n -#ss#7 #lu-nu- -ene-# uru#n "e# %#n#r# unsure y#n er8es#r "el-#0#nny# %"er#" 8u-. B<0 #lu-nu- y#n erenn #%#l#0 8#u"s y#n -en#n%un Al2O+. Unu" e"sr#"s #lu-nu-7 8#u"s erlu %-urn"#n 8er%#s#r"#n s6# #-6,er %#r #lu-nu- %#n seny#;#ny#. Mul#=-ul# #%# 8#u"s %#-8#0"#n l#ru#n N#OH e"#7 y#n #"#n -el#ru"#n Al2O+. Ke-u%#n !# en,,r y#n %#" -el#ru %## %s#0"#n %en#n &#r# eny#rn#n. Al 2 O 3( s) + 2 OH → 2 AlO2 + H 2 O
9"# 6lr#e -en#n%un AlO2 %#s#-"#n er8enu" en%##n Al(OH)+. AlO 2+ H 3 O→ Al ( OH )3( s)
Seel#0 %s#rn7 Al(OH)+ %<#r %#n 0#sl e-<r#nny# #%#l#0 Al2O+(s). 2Al(OH)+(s)
#n#s
Al2O+(s) > +H2O(s)
(T- K-# An,r#n"7 214) T#;#s #%#l#0 "el,-," #r#- r#n"# 8er0%r# 8eru# Krs#l %#n 8ers6# s,-,r6 . #;#s n %"en#l %en#n n#-# KAl(SO4)2.12H2O y#n %"en#l 8#ny#" se8## ",#ul#n %%#l# en,l#0#n #r -#uun l-8#0. Se8## ",#ul#n #lu-nu- sul6# s#n# e6e"6 unu" -enen%#"#n #r"el y#n -el#y#n 8#" %#l#- 8enu" ",l,% -#uun susense. Alu-eru#"#n s#l#0 s#u seny#;# "-# y#n %8u# %#r -,le"ul #r %#n %u#
L#ru#n #lu-n# %ner#l"#n %en#n #s#- sul6# -ul#=-ul# er8enu" en%##n 8er;#rn# u0 %#r #lu-nu- 0%r,"s%# Al(OH)+. 2 KAlO2 (aq )+ 2 H 2 O( l) + H 2 SO4 ( aq) → K 2 SO 4( aq) + Al ( OH )3( s)
3en#n en#-8#0#n #s#- sul6# en%##n u0 se-#"n 8#ny#" %#n <"# #s#- sul6# 8erle80#n en%##n #"#n l#ru -e-8enu" "#,n K >7 Al+>7 %#n SO42=7 <"# %%#-"#n #"#n er8enu" Krs#l %#r #;#s "#lu- #lu-nu- sul6#. Se&#r# sn"# re#"s y#n er<#% %## %uls"#n se8## 8er"u. H 2 SO 4 ( aq) + K 2 SO 4 ( aq) + 2 Al ( OH )3( s ) →
2KAl(SO4)2(#) > /H2O
24H2O > 2KAl(SO4)2(#)
→ 2KAl(SO ) .12H O 4 2 2 (s)
Alu- "#lu- s#n# l#ru %#l#- #r #n#s7se0n# "e"# seel#0 en#-8#0#n H2SO4 y#n -e-8enu" en%##n %#n "e-u%#n %#n#s"#n7 e-#n#s#n se8#"ny# %l#"u"#n #%# su0u /=,@ unu" -enu#"#n #rny# %#n su0u e-#ns#n %#" 8,le0 le80 %#r ,@ "#ren# #;#s #"#n l#luru %#l#- #r -en%%0. Ke"# "rs#ln #lu- "#lu- %#n#s"#n er<#% e-s#0#n se&#r# "-#7 %#n se8##n #r#- y#n er0%r#s erl#ru %#l#-. P#%# r,ses enu##n sel#-# 1 -en %#n %%nn"#n #"#n er8enu" Krs#l %#r KAl(SO4)2.12H2O. Re#"s "eseluru0#n 2Al(s) > 2KOH(#) > 1H2SO4(#)
→ 2KAl(SO ) .12H O > +H (R5#7 1??) 4 2 2 (S) 2
ALAT DAN BAHAN Al# 1. Gel#s "-# 2 -l: 2 8u#0 2. @#;#n enu#: 1 8u#0 +. Srus: 18u#0 4. K#s#: 18u#0 . K#" #: 18u#0 /. P##n en#%u": 1 8u#0 *. @,r,n: 1 8u#0
B#0#n 1. Al2(SO4).1H2O 2. K 2SO4 +. Ker#s s#rn
PROSEDUR KERJA ++74 Al2(SO4)+.1H2O •
Mel#ru"#n #%##n %#l#- 2-l #r7 su0u #r ,@
87 ! K 2SO4 • •
Mel#ru"#n #%##n %#l#- -l #r Men&#-ur"#n Ke%u# l#ru#n n
"#$%&'#( • •
Me-n%#0"#n "e%#l#- &#;#n enu# Men%nn"#n #%# su0u "#-#r 0n# er8enu" Krs#l
K')*+#, •
Men&u& %en#n se%" #r %#n "ern"#n %en#n "er#s s#rn
TABLE PENGAMATAN Perl#"u#n Pen#-##n 1/7* Al2(SO4)+.H2O %l#ru"#n %#l#- L#ru %#n l#ru#n 8er;#n# u0 susu 2-l #r7 su0u #r ,@ 7* K 2SO4 %l#ru"#n %#l#- -l #r
L#ru %#n l#ru#n 8er;#rn# 8enn %#n
se%" #%##n %#" l#ru L#ru#n Al2(SO4)+.H2O %&#-ur l#ru#n Ber&#-ur %#n l#ru#n 8er;#rn# u0 K 2SO4 38#r"#n sel#-# 0#r
susu Ter8enu" en%##n 8er;#rn# u0
PERHITUNGAN 3"e#0u : Mr K 2SO4
C 1*4 '-,l
Mr Al(SO4)+.1H2O
C /* '-,l
M#ss# K 2SO4 y#n %-8#n
C 7*
M#ss# Al(SO4)+.1H2O y#n %-8#n
C 1/7*
Ber# "er#s s#rn > 8,,l 6l- ",s,n
C 47*+/
Ber# "er#s s#rn > 8,,l 6l- ",s,n > #;#s
C +7++//
3#ny# : ersen ren%e-en D Penyeles##n: Re#"s
: K 2SO4 > Al(SO4)+ > 24H2O
→ K SO .Al (SO ) .24H O 2 4 2 4 + 2
5,7 g
M,l K 2SO4
C
174 g / mol
C 7+ -,l
16,7 g
M,l Al(SO4)+.1H2O C
M,l KAl(SO4)2.12H2O M#ss# 9#%7 -#ss# e,rs #%#l#0 M#ss# #;#s F ren%e-en
670 g / mol
C 72 -,l
massa C Mr C 7+ -,l ?2 '-,l C 27/ C 27/ C +7++// = 47*+/ C 27/1 massa praktis C massa teoritis . 1F 25,6001 g
C
28,56 g
C ?7/+/ F
. 1F
PEMBAHASAN P#%# er&,8##n "#l n y#u e-8u##n #;#s (2KAl(SO4)2.12H2O(s)). Per&,8##n %l#"u"#n seen#0 rese 0#l n %l#"u"#n unu" -en0e-# !# y#n %un#"#n %#n -en0e-# ;#"u. %-#n# %#l#- e-8u##n #;#s er<#% re#"s #n#r# 2 Al(SO4)+ > 24H2O → K 2SO4.Al2(SO4)+.24H2O ru-us #;#s y#n %0#sl"#n %se%er0#n#"#n %en#n -e-8u# ru-us e-rsny# -en<#% 2KAl(SO4)2.12H2O Se8elu- e-8u##n #;#s7 #r#- Al2(SO4)+.1H2O %l#ru"#n %en#n #r #n#s "#ren# s6#ny# y#n su"#r l#ru %#l#- #r %nn e# su0u #r 0#rus ,@ %#" 8,le0 le80 "#ren# <"# le80 %#r ,@ #"#n -en#l#- 0%r,ls se0n# #"#n er8enu" en%##n u0 (Al(OH)+)7 0#l n %se8#8"#n s6# y#n %-l" Alu-unu- y#u #-6,er y#n %## 8ere#"s %en#n seny#;# #s#- ##u 8#s#7 y#- -#n# #%# "e#%##n n s6# Al y#n 8er#s#l %#r #s#- le-#0 %#n <"# er0%r,ls #"#n -en<#% 8#s#. Ber%#s#r"#n en#-##n s## Al2(SO4)+.1H2O %l#ru"#n %#l#- #r7 l#ru#n 8er;#rn# u0 susu. Sel#n
KESIMPULAN 1. Al2(SO4)+ %#" l#ru %#l#- #r %nn se0n# %8uu0"#n #n#s unu" -el#ru"#nny# 2. Su0u unu" -el#ru" Al2(SO4)+ #%#l#0 ,@ "#ren# <"# le80 #"#n er0%r,ls se0n# er8enu" en%#n u0 +. T#;#s %8u# %#r re#"s #n#r# 2
JAWABAN PERTANYAAN 1. Ber"#n + re#"s enn %#l#- e-urn#n #lu-nu-D #. Al O > 2OH= → 2 Al O = > H O 2
+ (s)
2
2
→ Al(OH) + (s)
8. AlO2= > H+O> &. 2Al(OH)+
+
→ Al O > +H O 2 + 2
2. Tuls ers#-##n re#"s #n#r# l,#- #lu-nu- %en#n 8#s# "u# %#n 8#s# "u#D #. l,#- #lunu- %en#n #s#- "u# Al(H O) +> > H O → Al(H O) (OH)2> > H O> 2
/
2
2
+
8. l,#- #lunu- %en#n 8#s# "u# 2Al(H2O)/+> > +S2= → 2Al(H2O)+ (OH)+ > +H2S +. Tuls ers###n re#"s y#n -enun > /H2O → Al(H2O)/ +> B 3#l# 8#s# Al(H2O)/+> > +OH=
→ Al(H O) (OH) > +H O 2 + + 2
4. Tuls %u# &#r# -enuls"#n ru-us ,n #lu-n#D #. Al(OH)+(s) C en%##n u0 = 8. Al(OH)4 (#) C en%##n
DAFTAR PUSTAKA G.l"ns,n7 $. A. @. . (2*). Kimia Anorganik Dasar . 9#"#r#: UI ress. R5#7 H. (1??). Asas Pemeriksaan Kimia. <#"#r#: UI ress. T- K-# An,r#n". (214). penuntun praktikum kimia anorganik 1. P#%#n: un5ers#s neer #%#n.
