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1.
I
1.
2.:
( )( ) ( )
R L
diE U U E Ri ri L
dt
di E L diE R r i L i
dt R r R r dt
( )
E
R r
( )
L
R r
.
:i0di
dt
i=cte..
3.:( ) 0 ).(Bt Btdi
i tdt
A Ae A Be
Btdi ABdt
e :
( ) ( )
( 1 )( ) ( )
Bt Bt
Bt
E LAB
R r R r
E LAB
R r R r
A Ae e
A Ae
:
( ) ( )
( )1
( )
0
0
E E
R r R r
L R rB B
R r L
A A
4.
-
:12RU V .RU R I
0,12RU
I AR
--2:15
100 250,12
E EI r R r
R r I
-:312ms 12.10 s :( )
L
R r
:3( ) 12.10 (100 25) 1,5L R r L H
-:212
LLit=24msUR=10,4V
0,104RU
i AR
:2 31
1,5 0,104 8,11.102
LJ
5.1:
:di
E Ri ri Ldt
:
1( ) 15 125 0,104 1,33 .1,5
di E R r iA s
dt L
2:
:24
11215
1,35 .1, 5
t
Bt Btdi E E ABdt L L
diA s
dt
e e e
e
1.:2 6 2 41 1
.47.10 .6 8, 46.102 2
CCU J
2.:
2
2
0 0
0
C L C
C CC
diU U U ri L
dt
dU d U U rC LC
dt dt
3.i(t):
0C diU ri Ldt :
2
2 0CdU di d ir Ldt dt dt
C:
2
20C
dU di d iC rC LC
dt dt dt
:CdU
i Cdt
:2
20
di d ii rC LC
dt dt
4..
5.:12
1,11( )2 2 5, 42
T r SIL
R
L
60
2 2 162,77( )
2 5.4 47.10SI
T LC
0
2
2T
R
L T
.
T=0,1 s6
0 2 2 5.4 47.10 0,1T LC s :T=T0
6.:2 21 1
2 2
T L C C Li CU :
1 1.2. .2. .
2 2
( )
CTC
C
dUd diL i C U
dt dt dt
dii L U
dt
I: 3 920132012
II
E
(L,r)R
UR UL
:. CdU
i Cdt
7/29/2019 PC_devoir3-tr1-2012-2013.pdf
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:Cdi
U L ridt
:
2. 0T Td d
r idt dt
.
7.1.t=T=0,1s:UC=5,4Vi=0
2 2 6 2 41 1 0, 5 47.10 5, 4 6,852.10
2 2
T CLi CU J
t=5T/4=0,125s:UC=0i=-3,1.5.10-3A=0,0155A:
2 2 2 41 1 0,5 5.4 0.0155 6,486.102 2
T CLi CU J
2.:
4 4
5( ) ( )
4
6,486.10 6,852.10 0.366
T T Tt T t T
J
:0,366J
1.:
3
A
H O AK
AH:
3
3log( ) log( ) log( )AH O A A
pK H OAH AH
:
log( )AA
pK pHAH
:
log( )AApH pK
AH
2.
3.:
3
3
4,19
14
10
107,943.10
10
ApKA
e e
A A H O KK
K KAH HO AH HO H O
K
:K>104.
4.:max
fx
x: .
( ) ( )
[ ]( )
b b f f b b
af b b b
n HO C V x x C V n HO
x C V HO V V
:
3
10[ ] 10
[ ] 10
e
e
pKpH pKe
pH
KHO
H O
: 10 ( )epH pK af b b b x C V V V
-HO-
: 0m mb b b b C V x x C V
:
max
10 ( )
1 .10
e
e
pH pK
b b a bf
b
pH pKa b
b b
C V V V x
x C V
V V
C V
5.:(VbE=36,6mL, pHE=7,9)
6.:EE
b
a b
a
b
a ab
C VC V C V C
V :
32 16.10 36, 6 1, 09810 .
20a mol LC
:( )
m
m AHC
V:
2
1
( ) ( )
. 1, 09810 176
1,932 .
( ). ( )
( )
ma
m a
m
n AH m AH
g L
CCV M AH V M AH
C C M AH
C
7.1L1,932g
:3 1m
10 g .LV
1L:3 3m .V 10 1 10 g .90%=0,9.mm
1L:
=3
310 1,111.10 g0 ,9
m:
3
3
1,111.10 g 1 ,932 g( AH )
100 1 ,932100 g % 0,173g
1,111.10
100g173mgC170mg.
8.
.: 3.05 4 1
3 10 10 8,912.10 .pHH O A mol L
14
3
11 110]
[ ] 101,122.10 .e
pH
KHO
H Omol L
1
3 0,01 .a f
a
C V xAH C H O mol L
V
:
4
log( ) log( )
8,912.10
3.05 log( ) 4,10,01
A A
A
A ApH pK pK pH
AH AH
pK
.ph
