تصحيح الامتحان الموحد للباكلوريا الدورة العادية 2008:...

@ójnÙàóï÷bîïÑÜa@ãíÝÉÜa @fr.sup.bibliophy.www

ELGHZIZAL’S DOCUMENTS SCRIBD 1

مكتبة العلوم الفيزيائيةمكتبة العلوم الفيزيائيةمكتبة العلوم الفيزيائيةمكتبة العلوم الفيزيائيةhttp://www.bibliophy.sup.fr/



:::: pts7

I !)Acide Ibuprofène ( "#.

11( &'C0 ()) S0.

1

0

00

0

.01,01,0206

2,0

.

−≈×

=

==

lmolC

VM

m

V

nC

0,75pt

12 ( *+pH = 3,17 ()) S0

121 ( "# ! ,- .!/ (.1,25pts

RCOOH + H2O ?

RCOO

- + H3O

+

(mol)

0 C0.V0 0 0

x C0.V0 – x x x

x = xf C0.V0 – xf xf xf

x = xmax C0.V0 – xmax xmax xmax

0 ! 1 2 ,'# 3 4 5'6

78+9 :;:Xmax

C0.V0 – xmax =0 ⇒ xmax= C0V0 = 10-2

.10-1

=10-3

mol

.<=6 :;Xf

[ ] molVVOHOHnx pH

f

517,3

0033 10.76,61,0.10.10.)( −−−++ =====



.<=6 :; '>τ 002

3

5

max

76,610.76,610

10.76,6==== −

−

−

x

x fτ?3 1⟨τ 1 @6# !

A# :

RCOOH + H2O RCOO-

+ H3O+

122 ( ! BCDQr:

[ ] [ ][ ] ( ) 000

2

000

2

0

23

../.

/

VxVC

x

VxVC

Vx

RCOOH

RCOOOHQ

i

ii

r−

=−

==−+

(0,5pts )

123 ( EF6 : +G,1pts :

, #Qr 6:

124 ( +K*C ! >; : 0,75pts

II – # I; JK 7) ' C; /

21( ! A,# 0,75pts

OHRCOOHORCOOH 2+→+ −−

22( 2 2 ; 3 6

molxVCRCOOHn

molVCHOn

A

BBi

3

max00

332

10.)(

10.8,110.60.10.3.)(

−

−−−−

===

===

L>3 2A# K 1 @6#HO- M 2A# K # K3 (0,5pts)

( ) ( )

( ) ( )

( )τ

τ

τ

τ

τ

τ

ττ

−=

−=

−=⇒

=⇒=

−=⇒

−=

1

.

.

.

.

.

...

0

max

2

,

maxmax0

max22

max000

max22

,

max

max

000

2

,

000

2

V

xQ

xxV

x

xVCV

xQ

xxx

x

VxVC

xQ

VxVC

xQ

éqr

éqr

f

f

f

f

éqrr

( ) 5

2

223

,

0

3

max

2

10.9,4)10.76,61(1,0

10.76,610

1,0

10

10.76,6

−

−

−−

−

−

=−

==

=

=

=

KQ

LV

molx

éqr

τ



23 ( 2,#HO- .;:

321 ( N 6 : 1pts

restHOnVC éqAA )(. ,

−= 2A# KHO- . .;20ml .) ! O)P #

molHOnHOn

molrestHOnVC

restT

éqAA

4

423

,

10.31,8)(.3)(

10.77,210.10.7,27)(.

−−−

−−−−

==

=== "# nT K 2A# HO

- . ; VB=60ml

2A# K Q6'6 L>3 HO- "# ) ! nr(HO

-) = n0(HO

-) – nT

nr (HO-)= 1,8.10

-3 – 8,31.10

-4 = 9,69.10

-4mol

232 ( )K0,5pts

nr(HO-) = n(RCOOH) = mA/M(A)

m(A) = nr.M(A) = 9,69.10-4

.206 =0,199g=0,2g ≈200mg

3 Q6'> JK 7) ' C; /



1 6 LR _5T (# . L;T2pts

1 ( UV6 ,WX :A8 2>.

11 (0,5pts eMgNa0

1

24

12

24

11 −+→−β

12 ( 3 Y),>2/1

2ln

t=λ @6# :1510.28,1

)3600(15

69,0 −−≈= sλ0,25pts

2 (

21( : . "V :A8 86 2A# K &'.0,5pts

5'6 n0 =C0.V0 = 10-3

.5.10-3

=5.10-6

mol . ,W Z+6 >+ 5':

tteNNenn

λλ −− =⇔= 00. @6# :)3600(310.28,16

01

5

1 10.5×−−

−

−== eenntλ

L. [n1= 4,35.10-6

mol

22 ( \) 6 6, UV>t1= 3h 0,25pts BqnNNa A

13

111 10.35,3... === λλ

23 ( ] ^- # A;! : Y :

C# , @)K ] :A . 7;_ # 1 I_ #3h 0 : n1= 4,35.10-6

mol

Y : )V2 = 2ml 0 n2 = 2,1.10-9

mol .

3 :A8 86 24 Y _6 +G `60 1 @)K ' . '># \6# ! [ #

:A8 86 2A# K24 : & #>V ] 6 : Y

0,5pts

?A, '> 6 : Y 3 ) b :) +! ( 0VN =5L 3 Q6'> : VP = VN – V =5,00 – 4,14 ≈0,86 L = 86mL

LV

Vn

Ln

14,410.1,2

10.210.35,4

10.35,4

10.210.1,2

9

36

6

1

39

2

=×

=⇒

→=

→=

−

−−

−

−−



2 : = c dF LR,_ )5pts( I : dF W 11 ( )e! A,: 1pts

EtUdt

tdURC

ERitU

dt

tdUC

dt

dqi

tCUq

EtUtU

C

C

C

C

C

RC

=+⇒

=−+

==

=

=−+

)()(

0)(

)(

)(

0)()(

12 ( A, # I;

13 ( 3 6(RC=τ # , :

[ ][ ] [ ][ ][ ]

[ ][ ]

[ ]tI

U

U

tICR =×=

..

( fXRC ,

@6 , #>F

14 ( #

FFFR

C µτ

10010.1001010.10

1 64

3===== −−

ττ

τ

τ

τ

ττ

τ

τ

=⇔=−

=−+⇒

=

−=

−

−−

−

−

RCeRC

E

EeEeE

RC

eE

dt

tdU

eEtU

t

tt

t

c

t

C

0)1(

)1(.

)(

)1()(



15 ( <= +T : Y< :\6 . dF ^- # >P 0 ,75pts

JCEEe

3242 210.712.10.2

1

2

1 −− ===

.>F – dF# g!

21(, #UC(t) 6 1pts

22( g! h 3 5 dF) [_3τ @6# i/3 5'

,rC='τ3 #;# i/0,5pts

Ω=−

=

=⇒

=

−

−

−

−

−

−

20

360

45,132ln10

10.2

.36045,132

.360)(

4

3

10.

10.2

.1

4

3

1

r

e

etU

r

Cr

t

C



3 j> c6 ;F (# . 5)/ Y'k U;_ _CA Y\6pts

1 ((9 : U;' _CA 11( .>F > >+ :

_C : l68

;T m; Ak : (01

= n T m;

@6# O; @> l68 "hP :

ag

amPamFi

=⇒

=⇔=∑ . ;' +G, U;_1

Y), ( )jiO

,, 6 )b o,> ?M :

LT, #:

00 ⟨xV ?3 1

0 50 −− msV x mxx A 4500 == @6# :45050)( +−= ttx.

00 =yV 210 −== msga y 00 =y @6# :25)( tty =

12( pC9 ]T' :TCR \

\) 6 ts 8 pC9 7X l68 ys = H= 405m 6# A, # @6# y(t)

sHy

ttty sssss 9

555)(

2===⇒=

13( C' A,#:

6# A, # # .8;>

00

2

00

2

1)(

)(0

ytVtatyga

xtVtxCVa

yyy

x

ste

xx

++=⇔=

+=⇔=⇔=



( )

4058,110.2

10.29550

45055

50

45045050)(

23

22

2

2

+−=⇒

−=

−=⇒=

−−=⇒+−=

−

−

xxy

xx

yty

xtttx

2 ( qF : ` U;' _CA:

21 ()e! A,

6 .>F >;:

∑ =+=dt

VdmfPF

7) U;_( )i

,0 :

Vdt

dV

VVgdt

dV

dt

dVmmgV

3

210

150

10010

150

100.

150

150

100

−=

−=−=

=+−

22 ( U;') # ':

23( .< :\6 2 ; ;

24( 3 ;- A . (:



+ A6V4 a 4

)e! A, #Vdt

dV

3

210 −=

6 :443

210

4

Vdt

dVa

t

−=

= 334 . VtaV +∆= "#τ⟨⟨=∆ 1,0t

&'1

4 612,380,21,012,8 −=+×= msV

&'a4

2

44 59,7612,33

210

3

210 −=×−=−= msVa

(i ' : f_3 5TP >F <! :), * 6-

KC'!_ 3 \G# , 3 I) ; oM0 ( : .>R (8R k :

com.hotmail@elghzizal_h

"+) [k 3 :fr.sup.123phy.www

تصحيح الامتحان الموحد للباكلوريا الدورة العادية 2008:...

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