bac blan hikma 2016

 2
COOHHC 56
210E
1
56 mol.g122)COOHHC(M 
1
356 mol.g136)COOCHHC(M 
+
3
-3 2 -1
HO
λ = 35.10 S.m .mol
123
COOHC mol.m.S10.24,3
56
i
iiX.
i
X
i
)S(
13 l.mol10.5C 
V =200 ml
)S(
12 m.S10.03,2 
(0,25)
éq
x
OH3
COOHC 56
V
éq
x
)5 (0, 
A
K
-
6 5 (aq) 6 5 (aq)
C H COOH C H COO
2
éq
Aéq
x
K=
V.(CV-x )
A
pK
 )5 (0,
pH
(aq) (aq)
-
6 5 6 5
C H COOH =10. C H COO
)(0,5
0,15 g
ml50VA
 )aq()aq(HONa
12
Bl.mol10C
 (0, 5)
BE
V = 6 ml
A
C
 (0,25)
m
1V0
 (0,5)
356 COOCHHC
mol1,0n1
6 5 (aq)
C H COOH
2
n = 0,1mol
3(aq)
CH OH

 3
x (10-2mol)
T
t (min)
 (0,5)
x
 (0,25)
0t0
)(0, 5
2
1
t
)(0, 5
(0, 5)
2+
aq s
Sn /Sn
2
2 g l
O / H O
.
4 -1
1F = 9,65.10 C.mol
.
-1
M Sn =118,7g.mol
2+ 2-
aq 4 aq
Sn +SO
 (0,5)      
(0,25)
 (0,5)  
Δt = 10 min
I = 5 A
(0,5)

 4
K
(D)
(b)
+
-
G
1,5 
λ 
d D =2 m
L
1/d
λ = 660nm
λ = 0, 44μm
λ = 0, 64μm
L=2cm
d
-5
d =1,76.10 m
-5
d =1,32.10 m
-5
d = 0,88.10 m
λL’= 1,5cm
λ
λ.L
λ' = L'
λ.L'
λ' = L
λ.L
λ' = 2.D
1,5 
1/2
t =16,17 jours
1/2
t =14 jours
1/2
t =161,7 jours
75%
1/2
t = 3.t
1/2
t = 2.t
1/2
1
t = .t
2
4,5
3,5
Lr
bLrD
 50R
G
V6E

 5
R
u (t)
R
u =f(t)
R
u (t)
(0,5
- t
τ
R Rmax
u (t) = U (1-e )
Rmax
U
(0,5
rL(0,5
F10C
G
V6E 
b
q(t)
(0,25
q(t)
(0,5
Lb
0
T
T
10
2
(0,25
t = 0
t =20ms
(0,5
b
i.ku 
k
)SI(50k
r
(0,5
= 2,5 mH
0
L
0
C
0
C
0
L
000
1
f=
2π L C
p
F =10 kHz
s
f =1000 Hz
(0,5) 
0
C =1nF
(0,5)

 6
5,5 
Gt = 0
= 12 m/s
0
vα = 37°
2-
g = 9,8 m.s
(O; i;k)
0
v
( i;k)
Ot = 0
(t)
G
x(t)
G
z)1(
1
t
2
t1,20 m
(0,5)
)
2
(t
G
x
2
t 5)2(0,
90 km/ht = 0
M1,2d = 50 mO
(t)
M
x(t)
M
zM(0,5)
(0,75)
 2,5 
P
O
r
P
S/P
F
M
P
m
SI
11-
G = 6,67×10