relatorio determinação de sulfato - quase pronto - conclusão de gravimetria

8/18/2019 Relatorio Determinação de Sulfato - Quase Pronto - Conclusão de Gravimetria

1/21

UNIVERSIDADE FEDERAL DO PARÁINSTITUTO DE TECNOLOGIA

FACULDADE DE ENGENHARIA QUÍMICACURSO DE GRADUÇÃO EM ENGENHARIA QUÍMICA

QUÍMICA ANALÍTICA EXPERIMENTAL

DETERMINAÇÃO DE SULFATO POR ESPECTROFOTOMETRIA E GRAVIMETRIA

DISCENTES:

BELÉM-PA20 !


2/21

Sumário1 INTRODUÇÃO.......................................................................................................................51.1 DETERMINAÇÃO DE SULFATO POR GRAVIMETRIA.................................................5

1.2 DETERMINAÇÃO DE SULFATO POR ESPECTROFOTOMETRIA..............................52 MATERIAIS E METODOLOGIAS........................................................................................72.1 PROCEDIMENTO EXPERIMENTAL................................................................................72.1.1 GRAVIMETRIA................................................................................................................7MATERIAIS E REAGENTES...................................................................................................72.1.3 PROCEDIMENTO EXPERIMENTAL.............................................................................72.2 ESPECTROFOTOMETRIA.................................................................................................92.2.1 PROCEDIMENTO EXPERIMENTAL.............................................................................9

2.2.2 FLUXOGRAMA.............................................................................................................113 RESULTADOS......................................................................................................................123.1 GRAVIMETRIA.................................................................................................................123.2 ESPECTROFOTOMETRIA...............................................................................................143.2.1 CURVA DE CALIBRAÇÃO...........................................................................................144 CONCLUSÃO.......................................................................................................................224.1 GRAVIMETRIA.................................................................................................................224.2 ESPECTOFOTROMETRIA...............................................................................................22

REFERÊNCIAS BIBLIOGR FICAS......................................................................................23

http://var/www/apps/conversion/tmp/scratch_7/HYPERLINK%23_Toc391333700http://var/www/apps/conversion/tmp/scratch_7/HYPERLINK%23_Toc391333700


3/21

1 INTRODUÇÃO

O "#$%&'( ) ( *+,(+ SO! -2 #. /(" .&," & #+/&+'1" (+" +& +&'#314&5 S#361

+&" 76#&" "# '133*+1&" &'3&8)" /& /,""($#9 ( /1 "($(" 1 3(;5 555 N&" 76#&" "#?13%,;,&," (;(331 &'3&8)" /&" /1";&36&1"6('(" /(.)"',;(" =?(3 1@1.?$( &'3&8)" /& /163&/&9 ( /1 ?3('1 +&"> 1 1%$#1+'1",+/#"'3,&," =1@1.?$(": 1%$#1+'1" /1 ,+/ "'3,&" /1 ;1$#$("1 1 ?&?1$ # .,;&%&3.&; #',;& 1';5>5=MORITA MET >

E. 76#&" '3&'&/&" ( "#$%&'( ) ?3(81+,1+'1 /( 1.?316( /1 ;(&6#$&+'1" ;(.(

( "#$%&'( /1 &$#. +,( "#$%&'( %133("( "#$%&'( %)33,;( 1 ;&?&33("& ;$(3&/&5 =MORMET >

O" .)'(/(" #',$,4&/(" 3(',+1,3&.1+'1 ?&3& & /1'13.,+&9 ( /1 "#$%&'( 1.&.("'3&" /1 76#& " ( & 63&8,.1'3,& 1 & '#3 ,/,.1'3,&5=CABRERA 200 >

1.1 DETERMINAÇÃO DE SULFATO POR GRAVIMETRIA

O .)'(/( ;(+","'1 +& $1+'& &/,9 ( /1 #.& "($#9 ( /1 ;$(31'( /1 73,( 1.#.& "($#9 ( & #1;,/& /1 "#$%&'( $181.1+'1 &;,/,%,;&/& ;(. 7;,/( ;$(3 /3,;(5 O?31;,?,'&/( ) %,$'3&/( $&8&/( ;(. 76#& ;#,/&/("&.1+'1 "1;( 1 ?1"&/( ;(.("#$%&'( /1 73,(5 =VOGUEL J ?5! 0>

A 31&9 ( & #&$ & /1'13.,+&9 ( /1?1+/1 &?&31+'& "13 ",.?$1"5 C(+'#/(1"'7 +& 31&$,/&/1 "#K1,'& & ,+ .13(" ?("" 81," 133("5 R1"#$'&/(" "&',"%&' 3,("?(/1. "13 ( ',/(" &?1+&" "1 &" ;(+/,9 1" 1@?13,.1+'&," %(31. ;#,/&/("&.1+'1;(+'3($&/&"5 =VOGUEL J ?5! 0>

1.2 DETERMINAÇÃO DE SULFATO POR ESPECTROFOTOMETRIA

N& /1'13.,+&9 ( /1 "#$%&'( ?(3 '#3 ,/,.1'3,& & "($#9 ( ;(+'1+/( (" (+""#$%&'( ) '3&+"%(3.&/& 1. #.& "#"?1+" ( /1 "#$%&'( /1 73,( "( ;(+/,9 1";(+'3($&/&"5 555 A .1/,/& /& ,+'1+",/&/1 /& 3&/,&9 ( '3&+".,',/& 1. %#+9 ( /&;(+;1+'3&9 ( /1 "#$%&'( ) & &"1 /& '#3 ,/,.1'3,&5 P&3& 31&$,4&3 1""&" .1/,/&" #"&-"1 #. 1"?1;'3(%(' .1'3(5 =ANDRADE ALVIM 200 >


4/21

U. 1"?1;'3 .1'3( ?',;( ) #. ,+"'3#.1+'( #1 ?(""#, #. ","'1.& ?',;(;&?&4 /1 ?3(/#4,3 & /,"?13" ( /& 3&/,&9 ( 1$1'3(.&6+)',;& ,+;,/1+'1 &'3&8)" /(

#&$ ?(/1 .1/,3 & #&+',/&/1 /1 3&/,&9 ( '3&+".,',/& 1. #. ;(.?3,.1+'( /1 (+/&

/1 #.& %&,@& 1"?1;'3&$ 1"?1; %,;&5 U. %(' .1'3( ) #. /,"?(",',8( #',$,4&/( ?&3& &.1/,9 ( /& ,+'1+",/&/1 /& 3&/,&9 ( '3&+".,',/& (# #.& %#+9 ( /1"'& #&+',/&/15Q#&+/( ;(. ,+&/(" 1. #. 1"?1;'3(%(' .1'3( ( 1"?1;'3 .1'3( 1 ( %(' .1'3( " (1.?316&/(" ;(+K#+'&.1+'1 ?&3& ?3(/#4,3 #. ",+&$ ;(331"?(+/1+'1 & /,%131+9& 1+'31& 3&/,9 ( '3&+".,',/& /1 #. .&'13,&$ /1 31%13 +;,& 1 /1 #.& &.("'3& 1. #.;(.?3,.1+'( /1 (+/& 1"?1; %,;(5 =VOGUEL J ?5 ! >


5/21

2 MATERIAIS E METODOLOGIAS

2.1 PROCEDIMENTO EXPERIMENTAL

2.1.1 GRAVIMETRIA

MATERIAIS E REAGENTESP3(81'& /1 0 .$E3$1+.1 13 /1 2 0 .$B&"' ( /1 8,/3(F#+,$ /1 8,/3(P,?1'& 63&/#&/& /1 0 .$P&?1$ /1 %,$'3(CS($#9 ( /1 B&C$2 & 0 =. 8> Á6#& /1"',$&/&5

2.1.3 PROCEDIMENTO EXPERIMENTAL

I+,;,&$.1+'1 ?1"(#-"1 1. &$&+9& &+&$ ',;& &" .&""&" /(" ?&?1," /1 %,$'3( 1+(.1(#-"1 (" 13$1+.1 13" =E3$1+.1 13 I 1 II>5

PREPARO DA SOLUÇÃO

N& 31&$,4&9 ( /& ');+,;& /1 &/,9 ( /1 ?&/3 ( ?31?&3(#-"1 #.& "($#9 (&/,;,(+&+/(-"1 & .&""& /1 #. ?&/3 ( ?3,.73,( ;(. ;(+;1+'3&9 ( /1 (+ "#$%&'(

;(+ !H2O>1. 0 .$ /1 76#& /1"',$&/&5 " &.("'3&" I 1 II &/,;,(+(#-"1 2 .$ /1 HC$ & %,. /1


6/21

&;,/,%,;&3 ( .1,( #.& 814 #1 ( "#$%&'( " 31&61 ;(. ( B73,( 1. .1,( %(3'1.1+'17;,/(5

PRECIPITAÇÃO

A" "($#9 1" ?31?&3&/&" %(3&. ;($(;&/&" +& ; 2 .$ /( .1".( 31&61+'1 =B&C$ 2 & 0 =. 8>>5 D181-"1'13 1@;1""( /1 31&61+'1 ?&3& #1 & 31&9 ( "1K& #&+','&',8& ?(," & "($# ,$,/&/1 /(B&SO! /,.,+#, ?1$( 1@;1""( /1 (+" B& 2 5

D1,@(#-"1 & .,"'#3& 1. &+ %(, 1%1'#&/& & $&8&61. /(?&?1$ /1 %,$'3( ?&3& 31',3&3 ( ;$(31'( /& "#?13% ;,1 ;(. ( /18,/( ;#,/&/( ?&3& + ('3&+" (3/&35 P3(;1/,.1+'( 31&$,4&/( 1. /#?$,;&'&5 R1&$,4(#-"1 1""1 ?3(;1/,.1+'(?(3 '3 " 8141"5 D181-"1 %,$'3&3 ( ?31;,?,'&/( /1 B&SO! #1+'1 ?(," & 81$(;,/&/1 /1%,$'3&9 ( ) .&,(3 =?3,+;,?&$.1+'1 #&+/( "1 #"& ?&?1$ /1 %,$'3(> 1 & ?13/& ?(3 "($# ,$,/&/1 + ( ) ",6+,%,;&',8&5

A? " & $&8&61. &/,;,(+(#-"1 6('&" /1 +,'3&'( /1 ?3&'& 1 & "($#9 ( %,;(#'#38& ,+/,;&+/( & ?31"1+9& /1 ;$(31'( /1 ?3&'&5


7/21

CALCINAÇÃO

A? " & %,$'3&9 ( 1 & $&8&61. ( ?31;,?,'&/( %(, ;&$;,+&/( ?&3& 31',3&3 &

#.,/&/1 1 ?("'13,(3.1+'1 ?1"&/( ?(3 #.& ');+,;& /1 $& (3&' 3,(5

2.2 ESPECTROFOTOMETRIA

MATERIAIS E REAGENTES

P3(81'& /1 0.L

E3$1+.1 13 /1 !00.L

B&"' ( /1 8,/3(

B&$ ( 8($#.)'3,;( /1 00.L

B&33& .&6+)',;&

B#31'& 2 .L

A6,'&/(3 .&6+)',;(

E"?1;'3(%(' .1'3( =&K#"'&/( 1. !20+.>

B&$&+9& A+&$ ',;&

S#$%&'( /1 S /,( A+,/3(

S#$%&'( /1 A$#. +,(

C$(31'( /1 B73,(

2.2.1 PROCEDIMENTO EXPERIMENTAL

F(, /,8,/,/( 1+'31 &" 1 #,?1" & ?31?&3&9 ( 1. /#?$,;&'& /& &.("'3& ?&/3 (= .L 0 .L 20.L 2 .L 0.L 1 !0.L /1 "#$%&'( /1 " /,( &+,/3(> 1 &.("'3& '1"'1


8/21

=2 .L .L 1 0.L /1 "#$%&'( /1 &$#. +,(> ?&3& ?("'13,(3.1+'1 ;(.?&3',$


9/21

2.2.2 FLUXOGRAMA

C!"#$%" &$ B'#(" )5*+

S"!,- " /"0&(/("0 0%$

G!(/$#(0 ( '!/""!)5 L+

F"( &(/("0 &"

S,!6 %" &$ A!, 0(")35 L+

A " %# T$ %$

O 8# 0/" *, &$ %(! &1 L

B ! " :"!, ;%#(/"

C,#: &$ C !(8# - "

S,!6 %" &$ S $%#"


10/21

3 RESULTADOS

3.1 GRAVIMETRIA

RESULTADOS E DISCUSS ES

M&""& /1 S#$%&'( /1 A$#. +,( =A$2=SO!> !H2O> #',$,4&/& +( ?3(;1/,.1+'(1@?13,.1+'&$ ?1"&/& 1. &$&+9& &+&$ ',;&5Tabela 1 - M&""& /1 "#$%&'( /1 &$#. +,(

. =A$2=SO!> ! H2O> =6>I 0II 0 !

M&""& /(" ?&?)," /1 %,$'3( #',$,4&/(" +( ?3(;1/,.1+'( ?&3& & %,$'3&9 (/( ?31;,?,'&/(5Tabela 2 - .&""& /( ?&?1$ /1 %,$'3(

. /(" ?&?)," /1 %,$'3( =6>

I W2II 2

O" 8&$(31" /&" .&""&" /1 ?31;,?,'&/( ( ',/&" &? " & "1;&61. ?&3& &31',3&/& /& #.,/&/1 1"' ( +& '& 1$& 5T& 1$& - .&""& /1 "#$%&'( /1 73,( ?&?1$ /1 %,$'3( &? " & ?31;,?,'&9 (

. ="#$%&'( /1 73,( ?&?1$ /1 %,$'3(>

=6>I 2 0II 2 0 !

M&""& /( ?31;,?,'&/( ( ',/& ?1$& "# '3&9 ( /(" 8&$(31" /1 .&""& /&'& 1$& ?1$(" 8&$(31" /& '& 1$& 25

T& 1$& ! -massa do sulfato de Bário subtraída a massa do papel de filtro


11/21

U',$,4&+/( & .&""& .($&3 /1 ;&/&"# "'*+;,& 1 & 1"'1 #,(.1'3,& /( S#$%&'( /1

A$#. +,( [ 2\ \ 2[ 2JJ 6 .($

A ?&3',3 /& 1"'1 #,(.1'3,& ;&$;#$(#-"1 & .&""& /1 S#$%&'( ?31"1+'1 +( S#$%&'(/1 A$#. +,(5

A$2=SO!> ! H2O =SO!>

! 6 .($ 2JJ 6 .($0 6 @X I[ 0 0 2J !XI[ 0 2 6 /1 =SO! >

R1&$,4(#-"1 (" .1".(" ;7$;#$(" ?&3& & "16#+/& &.("'3&5 A$2=SO!> ! H2O =SO!>

! 6 .($ 2JJ 6 .($

0 ! 6 @XII[ 0 2 JJ 6 /1 =SO!>

P(3;1+'&61. /1 S#$%&'( ?31"1+'1 +& &.("'3& /1 S#$%&'( /1 A$#. +,(: =0 2 \ 00> 0 [ !J !

P&3& ( '13 & .&""& /1 S#$%&'( ?31"1+'1 +( S#$%&'( /1 B73,( #',$,4(#-"1 #.&3163& /1 '3 " ",.?$1"5

B&SO! 2− ¿SO 4

¿

C2 6 .($ 6 .($0 ! 6 @XI[ 0 0 6 /1 S#$%&'( [ !

R1&$,4(#-"1 (" .1".(" ;7$;#$(" ?&3& & "16#+/& &.("'3&5

B&SO! 2− ¿SO 4

¿

2 6 .($ 6 .($0 ! 2J 6 @

. /( ?31;,?,'&/( =6>I 0 !II 0 ! 2J


12/21

XII[ 0 J 6 /1 S#$%&'( [ ! JP(3;1+'&61. /1 "#$%&'( ?31"1+'1 +& &.("'3& /1 S#$%&'( /1 B73,( #1 ?31;,?,'(#:!

CALCULO O ERROVl.inicial

¿ ∗100

E I =Vl.inicial− Vl. precipitado

¿ =0 >

U',$,4(#-"1 & 1 #&9 ( 0 ?&3& ;&$;#$&3 ( 133( /& /1'13.,+&9 ( &+&$ ',;&5

Vl.inicial¿

∗100 = 0,2693 − 0,19100,2693

∗100 = 29,07

E I =Vl.inicial− Vl . precipitado

¿

Vl.inicial¿

∗100 = 0,2688 − 0,18650,2688

∗100 = 30,61

E II =Vl .inicial− Vl. precipitado

¿

E"'& ?13;1+'&61. /1 133( 1. ?&3'1 /181-"1 &( %&'( /1 & 76#& #',$,4&/& +&$&8&61. /( ?31;,?,'&/( + ( 1"'&3 +& '1.?13&'#3& ,/1&$ = 00 C> (#'3( %&'(3 & "13 ;(+",/13&/( ) #1 & .&""& #',$,4&/& ?&3& %&413 ( ?3(;1""( /1 %,$'3&9 ( %(, #.&.&""& ?318,&.1+'1 '3&'&/& 1 + ( & #&$ 1"'78&.(" '3& &$


13/21

SO! 2-=??.> '3&+".,'*+;,&"= T>2

W J W 0 W 0 W0 J0 2 WW WJ J WJ J

20 ! !2 0 2

0 !W 0 2 ! 0 ! 0!0 !0 W W

A ?&3',3 /(" 8&$(31" /&" ;(+;1+'3&9 1" /(" ?&/3 1" 1 ( $(6&3,'.( /&?(3;1+'&61. /1 '3&+".,'*+;,& ?$('(#-"1 ( G37%,;( 0 31%131+'1 ;#38& /1 ;&$, 3&9 (?&3& & /1'13.,+&9 ( /& ;(+;1+'3&9 ( /1 (+" "#$%&'(5 N( #&$ ) &?31"1+'&/( &1 #&9 ( /& 31'& #1 "137 #',$,4&/& ?&3& & /1'13.,+&9 ( /& ;(+;1+'3&9 ( /& &.("'3&1. 31$&9 ( &( $(6&3,'.( /& ?(3;1+'&61. /1 T3&+".,'*+;,& /& .1".&5

1.961.9

1.75 1.71

1.69 1.6

f(x) = - 0.01x + 1.99R² = 0.97

Curva de Calibração

Log(%T)Linear (Log(%T))

Concentração dos padrões(ppm)

Log(%Transmitância)

G37%,;( ] C#38& /1 ;&$, 3&9 ( ?&3& /1'13.,+&9 ( /1 (+" S#$%&'(5


14/21

DETERMINAÇÃO DA CONCENTRAÇÃO DA AMOSTRA

A &.("'3& %(, ( ',/& & ?&3',3 /& /,$#,9 ( /1 .L /1 #.& "($#9 ( /1 (+"S#$%&'( = 0??.> ?&3& #. 8($#.1 %,+&$ /1 00.L5 A ?&3',3 /& E #&9 ( 02 /1'13.,+(#-"1 & ;(+;1+'3&9 ( %,+&$ /1 "#$%&'( /1 &$#. +,( "1+/( ,6#&$ & 0 0 ??.5

c (inicial )× V (inicial )= c (final )× V (final ) =02>

C(+",/13&+/(-"1 &" ,+;13'14&" /&" 8,/3&3,&" #',$,4&/&" /#3&+'1 ( ?31?&3( /&&.("'3& /1'13.,+&-"1 & ,+;13'14& 1. 31$&9 ( ;(+;1+'3&9 ( %,+&$ &'3&8)" /&E #&9 ( 0 5

c (final)= c(incial )× v (inicial)(incertezadas pipetas )v(final)(incerteza dobalãovolumétrico ) 0

C(+'#/( ?3,.1,3&.1+'1 ;&$;#$(#-"1 &" ,+;13'14&" 31$&',8&" /&" %(+'1" /1,;+13'14& ;(+",/13&/&"5

INCERTE A ASSOCIADA UTILI AÇÃO DAS PIPETAS

D,"'3, #,9 ( 31'&+6#$&3 =?,?1'& /1 2 .L>e absoluto= incertezada pipeta

√ 3= ±0,03 mL

√ 3= ± 0,0173205080756888 mL

D,"'3, #,9 ( 31'&+6#$&3=?,?1'& /1 0 .L>

e absoluto= incertezada pipeta√ 3

= ±0,02 mL√ 3

= ±0,011547005 mL

INCERTE A COMBINADA PARA AS PIPETAS:e cp= √ (0,0173205080756888 mL)2 +(0,011547005 mL)2= ± 0,020816659 mL

INCERTE A RELATIVA PARA AS PIPETAS:

erelativa paraas pipetas = absolutamedida

× 100 = ±0,020816659 mL35 mL

× 100 = ±0,05947617

INCERTE A ASSOCIADA UTILI AÇÃO DO BALÃO VOLUMÉTRICO DE00 .L

DISTRIBUIÇÃO RETANGULAR =BALÃO VOLUMÉTRICO DE 00 .L>


15/21

e absoluto= incertezabal ã ovolumé trico√ 3

= ±0,08 mL√ 3

= ±0,046188021 mL

INCERTE A RELATIVA

erelativa= absolutamedida

× 100 = ± 0,046188021 mL100 mL

× 100 = ±0,046188021

INCERTE A COMBINADA TOTAL:

e c t = √ (0,05947617 )2 +(0,046188021 )2= 0,075304369

R1'(3+&+/( & 1 #&9 ( 0 :

c (final)= 30 ppm× 35 mL(± 0,05947617 )100 mL(± 0,046188021 ) = ±

0,075304369 ppm

I+;13'14& & "($#'&:

e absoluto= 0,075304369 × 10,50 ppm100

= 0,007906958745 ppm

S1+/( &"",. & ;(+;1+'3&9 ( %,+&$ '1 3,;& 1 "#& ,+;13'14& " (:2− ¿

final teóricade SO4¿= 10,50 ppm(± 0,01 ppm)

c ¿

O" 8&$(31" /1 '3&+".,'*+;,& ( ',/(" & ?&3',3 /& 1"?1;'3(%('(.1'3,& ?&3& &&.("'3& 1"' ( ;(+',/(" +& T& 1$& 0 5 A"",. ;(.( (" 8&$(31" /(" $(6&3,'.(" +& &"1

0 ?&3& 1"'1" 8&$(31"5T& 1$& 0 ] R1"#$'&/(" /& &+7$,"1 1"?1;'3(%('(.)'3,;& /& &.("'3&5

A.("'3& T3&+".,'*+;,&= > L(6 0= T>5 WW J J 0 W W52 W 02 ! WW

A .)/,& &3,'.)',;& /(" 8&$(31" /1 $(6 0= T> ) ,6#&$ & J W 5 A?$,;&+/( 1"'1 8&$(3 1 #&9 ( ( ',/& & ?&3',3 /& ;#38& /1 ;&$, 3&9 ( /1'13.,+(#-"1 & ;(+;1+'3&9 ( /1(+" "#$%&'( = 00 !!??.> /1'13.,+&/(" ?1$& 1"?1;'3(%('(.1'3,&5

P&3& ( ;7$;#$( /& ,+;13'14& 1. 31$&9 ( ;(+;1+'3&9 ( ( ',/& & ?&3',3 /& $1,'#3& /(&?&31$


16/21

BURETA DE 2 .L #',$,4&/& ?&3& ( ?31?&3( /(" ?&/3 1"DISTRIBUIÇÃO RETANGULAR

e absoluto= incertezadaburetaa√ 3

= ± 0,03 mL√ 3

= ± 0,0173205080756888 mL

E. "16#,/& ;&$;#$&3&.-"1 &" ,+;13'14&" 31$&',8&" &'3&8)" /& 1 #&9 ( 0!5

erelativa= absolutamedida =0!>

O" 8&$(31" /&" .1/,9 1" 1 /&" ,+;13'14&" 31$&',8&" 1"' ( /& T& 1$& 0!5T& 1$& 0! ] V&$(31" /&" ,+;13'14&" 31$&',8&" 31%131+'1 " .1/,9 1" +& #31'& /1 2.L5

V($#.1" /&"&$ #('&"=.L>

I+;13'14& R1$&',8&=_.L>

A 0 00 ! ! 02B 0 0 00 W 20C 20 0 000J 02D 2 0 000 2J2

E 0 0 000 WWF !0 0 000! 0

C&$;#$&+/(-"1 & ,+;13'14& ;(. ,+&/& &'3&8)" /& E #&9 ( 0 :

√(incertezarelativa ( )valor medido )2

+! +(incertezarelativa ( " )valor medido )2

0

O '181-"1 & ,+;13'14& ;(. ,+&/& 31$&',8& ?&3& & #31'& ,6#&$ & _0 00!0 2WWJM$=ABALÃO VOLUMÉTRICO DE 00 .L UTILI ADO NO PREPARO DOS PADR`ES5DISTRIBUIÇÃO RETANGULAR:

e absoluto= incertezado #alãoVolumétricode 100 mL√ 3

= ± 0,08 mL√ 3

= ± 0 0! JJ02 mL

C&$;#$(#-"1 &" ,+;13'14&" 31$&',8&" &'3&8)" /& E #&9 ( 0! 1 (" 31"#$'&/(" 1"' (/,"?("'(" +& T& 1$& 0 5 A"",. ;(.( (" 8&$(31" .1/,/(" +(" &$ 1"5T& 1$& 0 ] I+;13'14&" 31$&',8&" ?&3& (" 8($#.1" .1/,/(" +(" &$ 1" 8($#.)'3,;("5

V($#.1" .1/,/("=.L> I+;13'14& R1$&',8&=_.L> A 00 0 000! JJB 00 0 000! JJC 00 0 000! JJ


17/21

D 00 0 000! JJE 00 0 000! JJF 00 0 000! JJ

E &'3&8)" /& E #&9 ( 0 ;&$;#$(#-"1 & ,+;13'14& ;(. ,+&/& 31$&',8& ?&3& ( B&$ (8($#.)'3,;(5 S1+/( 1"'1 8&$(3 ,6#&$ & _0 00 0 2W M$=B>5ESPECTROFOTOMETRO UTILI ADO PARA AS LEITURAS DOS PADR`ES5DISTRIBUIÇÃO RETANGULAR

e absoluto= incertezada leitura do Espectrofotometro√ 3

= ± 1 $% √ 3

= ± 0 WW T

C&$;#$(#-"1 &" ,+;13'14&" 31$&',8&" &'3&8)" /& E #&9 ( 0! 1 (" 31"#$'&/(" 1"' (/,"?("'(" +& T& 1$& 0 5 A"",. ;(.( (" 8&$(31" .1/,/(" ?1$( 1"?1;'3(%('(.1'3(5

T& 1$& 0 ] I+;13'14&" 31$&',8&" ?&3& &" .)/,&" /(" 8&$(31" $,/(" ?1$("1"?1;'3(%('(.1'3(5

M)/,& /&" '3&+".,'*+;,&"

= T>

I+;13'14& R1$&',8&=_>

0 W ! @ 0-WJ J W 22 @ 0-

! 0 000 02 W0 000 WJ

! 0 0 000 WW0W 0 000 ! 2!

E &'3&8)" /& E #&9 ( 0 ;&$;#$(#-"1 & ,+;13'14& ;(. ,+&/& 31$&',8& ?&3& &"

$1,'#3&" /1 /1 '3&+".,'*+;,& ( ',/(" ?&3& (" ?&/3 1"5 S1+/( 1"'1 8&$(3 ,6#&$ & _0 0002 ! =C>5PIPETAS UTILI ADAS PARA O PREPARO DA AMOSTRA5 A ,+;13'14& & "($#'& ;(. ,+&/& /&" /#&" ?,?1'&" #',$,4&/&" %(, ( ',/& /#3&+'1 (";7$;#$(" 31%131+'1" ,+;13'14& /& ;(+;1+'3&9 ( '1 3,;& /& &.("'3& 1 ( 8&$(3 ) ,6#&$& _0 020J .L5 O" 8($#.1" .1/,/(" %(3&. .L ?&3& ;&/& &.("'3&?31?&3&/&5 E &'3&8)" /& E #&9 ( 0 ;&$;#$(#-"1 & ,+;13'14& ;(. ,+&/& "1+/( 1"'1

8&$(3 ,6#&$ & _0 000J! 2=D>5BALÃO UTILI ADO PARA O PREPARO DAS AMOSTRAS


18/21

S& 1+/(-"1 /18,/( ;7$;#$(" &+'13,(31" #1 & ( 8&$(3 /& /,"'3, #,9 ( 31'&+6#$&3 ?&3&

( &$ ( 8($#.)'3,;( /1 00 .L '1. ( 8&$(3 /1 ± 0 0! JJ022.L5 C&$;#$(#-"1

&'3&8)" /& E #&9 ( 0! & ,+;13'14& 31$&',8& (" 8&$(31" ( ',/(" 1"' ( /,"?("'(" +&T& 1$& 0W &"",. ;(.( (" 8($#.1" .1/,/("5T& 1$& 0W ] I+;13'14&" 31$&',8&" /(" &$ 1" #',$,4&/(" ?&3& ( ?31?&3( /&" &.("'3&"5

V($#.1" .1/,/("=.L> I+;13'14& R1$&',8&=_.L>00 0 000! JJ00 0 000! JJ

E &'3&8)" /& E #&9 ( 0 ;&$;#$(#-"1 & ,+;13'14& ;(. ,+&/& 31$&',8& ?&3& ( B&$ (

8($#.)'3,;( #',$,4&/( +( ?31?&3( /&" &.("'3&"5 S1+/( 1"'1 8&$(3 ,6#&$ & _0 000 W=E>5EESPECTROFOTOMETRO LEITURA DAS AMOSTRASS& 1+/(-"1 #1 ( 8&$(3 /& /,",'3 #,9 ( 31'&+6#$&3 ?&3& ( 1"?1;'3(%(' .1'3( ) ,6#&$ &

± 0 WW T5 C&$;#$(#-"1 &" ,+;13'14&" 31$&',8&" 31%131+'1" & $1,'#3& /

&.("'3&"5 E"'1" /&/(" 1"' ( ;(+',/(" +& T& 1$& 0J5T& 1$& 0J ] I+;13'14&" 31$&',8&" 1 $1,'#3&" ( ',/&" ?&3& &" &.("'3&" &'3&8)" /(1"?1;'3(%(' .1'3(5

T3&+".,'*+;,&= T>

I+;13'14& R1$&',8&=_>

WW J 0 00W!20W 0 00W! !2J

E &'3&8)" /& E #&9 ( 0 ;&$;#$(#-"1 & ,+;13'14& ;(. ,+&/& 31$&',8& ?&3& &"$1,'#3&" /1 /1 '3&+".,'*+;,& ( ',/(" ?&3& &" &.("'3&"5 S1+/( 1"'1 8&$(3 ,6#&$ & _0 0 0!JJ0J =F>5S1+/( &"",. ;&$;#$(#-"1 ( 8&$(3 /& ,+;13'14& ;(. ,+&/& '('&$ "16#+/( & E #&9 (0 5

Incertezac .total= √ ( )2 +(# )2 +(& )2 +( ' )2 +( E)2 +( " )2 = ¿ 0 0

E+' ( & ?&3',3 /( 8&$(3 /& ,+;13'14& ;(. ,+&/& '('&$ /1'13.,+(#-"1 &'3&8)" /&

E #&9 ( 0 & ,+;13'14& 1@?&+/,/&5 N( #&$ #',$,4(#-"1 ( ;(1%,;,1+'1 /1;(+%,& ,$,/&/1 ,6#&$ & 2 a[2 ?&3& ( + 81$ /1 /1 ;(+%,&+9&5 P(3'&+'(:


19/21

( (v)= Incertezac . total× ) =0 >

( (v)= 0,011359 × 2

( (v)= ¿ _0 022W W

P&3& ( ;7$;#$( /& ,+;13'14& & "($#'&:

e| ¿| 9,100661344 ppm×0,022717100

= ¿ _0 0020 W??.

P(3'&+'( & ;(+;1+'3&9 ( ( ',/& & ?&3',3 /& &+7$,"1 1"?1;'3(%('(.)'3,;& ) ,6#&$& &?3(@,.&/&.1'1 0 ??. =_0 002>5


20/21

" CONCLUSÃO

".1 GRAVIMETRIA

".2 ESPECTOFOTROMETRIA

A'3&8)" /(" /&/(" ( ',/(" ?(/13.(" ;(+%,3.&3 #1 ( 1@?13,.1+'( %(, ;(+/#4,/( /1%(3.& "&',"%&' 3,& 1 ;(+"1 #1+'1.1+'1 & 1%,;, +;,& /& &+&$,"1 1"?1;'3(%('(.)'3,;&+& /1'13.,+&9 ( /1 (+" "#$%&'(" %(, ;(+%,3.&/& ?(," & ;(+;1+'3&9 ( /1 (+""#$%&'(" ( ',/(" 1"'& ?3 @,.& ;(+;1+'3&9 ( '1 3,;& /& &.("'3&5


21/21

REFER#NCIAS !I!LIOGR$FICAS

relatorio determinação de sulfato - quase pronto - conclusão de gravimetria

Documents