Page 171 - 006
P. 171
165
+
pH = - log [H ]
£ pH
+
[H ] = 10
+
-
H O H + OH
2
+
-
[H ][OH] = 10 £ 14
+
£ 7
[H ] = 10
pH = 7
10.2.2 M; ## $ (How it works)
L
(& pH "K L 7 L
( 7 ( ' % ( * H+ L
'5(
/
/
.
+7 K +/ ( 5 7
R
!
1) !F O pH : O!8 8" $$8U " (indicator regent method) L
7
R
,
* ( & 5 ! 3!
#! " '
(& pH (5(*
/" !
)
/
1
! " L 7* ( L ' / "
'!(
*
( " " % 5 ! H'
1
Y
/
0
1
( ## # '+
& ## 6/ 5( "
"# ' "#& !*
!
"
!
\
2) F O pH : 8;#Q $O[yQO$8U (hydrogen electrode method)
!
^
. ' Y
' ('! H((
6
!5U ( * " ." . * 5 !
)
/
0
1
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/
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#& 5U ( *
* H)
!
Y
T
,
/
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6/
L L ' %
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/
7
^
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0
%&6
!5U ( * & !
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5 5('*
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3 (. ( 6/ *
6
!
!
\
!
3) F # $ O _ pH : 8;#Q $O [yO$ (quinhydron electrode)
& 5U( 3 !
! & C H (CH) C H O " ! '* (
/
)
+/
71
2 6 4 2
6 4
6/
0
7
)
Y
' ( . ' " . ' * Y
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& $
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)
Y
' ( 2 & 5U( * /" # ! 5 & (quinine;
7
1
(C H )O ) !
#& pH ! ''
( L
( ##
#
/
6 4
2
( " %
(& pH *1
(' /& /1
8
\
!
!
4) F # $ O _ pH : 8;#Q $O2; (antimony electrode) Y
' (
0
1
+/
/
,
6/
'' *
. * H)
& 6 #( "V ,
5 ( Y
' (H)
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7
c
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Y* "5 ") ) 5U(
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Y
5
0
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5 (* "
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+/
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/
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1
#( "V ) 5 ( * ' Y
' (
##' 5 ! " ( H * 6
%
1
6/
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Y
,
Y
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/
