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‫ء‬

‫1ا‬

‫ا‬
‫تا‬

‫ا‬
1

:

‫دو‬

‫و‬

‫ال ا‬

‫ة وا‬

‫ا آ‬

‫د‬

‫ا‬
*

2−
7

3+

Cr2O (aq) / Cr (aq)
Cr2O72− (aq) + 14 H + (aq) + 6e − = 2Cr 3+ (aq) + 7 H 2O(ℓ)
‫ت‬

‫آ‬

2−
3

‫ أ ن‬S 2O ( aq ) ‫ت و‬

*
‫ : أ ن‬S 4O ( aq )
2−
6

‫ا‬

S4O62− (aq) / S2O32− (aq)
S4O62− (aq) + 2e− = 2S2O32− (aq)
*
−

C ℓ 2 ( g ) / C ℓ (aq )
C ℓ 2 ( g ) + 2e − = 2Cℓ − (aq)
*
3+

Fe (aq) / Fe( s )
Fe3+ (aq) + 3e − = Fe( s)
‫ت‬

‫آ‬

‫ : أ ن‬S 2O82 − ( aq )

‫وآ‬

S2O82− (aq) / SO42− (aq)
S2O82− (aq) + 2e− = 2SO42− (aq)
*
H 2O2 (aq ) / H 2O (ℓ)
H 2O2 (aq ) + 2 H + (aq ) + 2e− = 2 H 2O (ℓ)

*
2−
4

SO (aq) / SO2 (aq )
SO42− (aq) + 4 H + (aq) + 2e− = SO2 (aq) + 2 H 2O
*

CO2 (aq) / H 2C2O4( aq )
2CO2 + 2 H + (aq) + 2e − = H 2C2O4 (aq)
:

‫ا‬
:

...
ifrance
...
V
V
ρ
...
0, 013 = 0 ⇒ n0 ( Al ) = 0, 026mol
n0 ( Al ) =

: I- ‫دور‬

‫تا‬

m ( Al )
⇒ m( Al ) = 0, 69 g
M ( Al )

3
:
‫د ا‬
‫1 ــ ا‬
‫ه ا ء ا وآ‬
‫تا‬
‫ا‬
+
−
H 2O2 ( aq ) + 2 H ( aq ) + 2e = 2 H 2O (ℓ)

‫وأ‬

2 I − ( aq ) = I 2 ( g ) + 2e −

: ‫ه‬
‫د ا‬
H 2O2 ( aq ) + 2 H ( aq ) + 2 I ( aq ) → 2 H 2O + I 2 (aq )
+

‫ا‬
‫ا‬
‫نا د‬
(‫)ب‬

‫آ‬

‫ا‬

(1)
‫ا ارة‬
‫در‬
‫أآ أي أن‬
‫)3( وا‬
‫ا‬

Allal mahdade

‫ارة و‬
‫ا‬
‫)2( و‬
‫را‬
(‫)أ‬

‫ا‬

‫در‬

−

(2) ‫)1( و‬
‫إ‬
(2)
‫ا‬
‫نا د‬
‫ا‬
‫ته‬
‫آ ا‬
‫ن‬
‫ا ارة‬
‫در‬
‫ار‬
‫آ‬
‫)2( و‬
‫نأ ع‬

...
ifrance
...
‫ا‬
‫ء‬

‫ال ذا‬

‫ةـا‬

‫أآ‬

‫ت‬
‫ا‬
‫نه اا‬

‫2 ــ‬
‫3 ــ ا‬
‫ا‬

‫ا ي‬
‫د‬
‫وط ا‬
5
:

‫ا‬
: 2 ‫1 ــ‬
SnO2 ( s) + 4 H + (aq) + 2e − = Sn2+ (aq) + 2 H 2O

Pb( s ) = Pb 2+ (aq) + 2e −

...
‫ص‬
‫2 ــ 1 ا‬
2−
+
2−
3+
CrO7 (aq ) + 2 H + 3Sn ( aq ) → 2Cr ( aq ) + 3SnO2 ( s ) + H 2O 3 ‫2 ــ‬
‫نا‬

‫ا‬

http://sciencephysique
...
com

‫ول ا‬

‫لا‬

‫3 ــ 1 ا‬

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