Compo Trim2
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7/24/2019 Compo Trim2
1/2
1
Ex- Lyce mixte Maraval - Oran
008
))6
VA = 10 mLCH3COOH
Cb = 1,0101 mol/ L.pH = f (Vb)
1 )VbEpHE(
2-
CH3COO
/CH3COOH
V = 3 mL
.)-3
.)
.)
) .
.[[CH3COOH4
)4(V1 = 10 mL)CH3COONa(
C1 = 102 mol/ L
= 20 mLV2)HCOOH(C2 = 102 mol/ L.
1 ./
.2
3
.
.4
HCOO/HCOOHCH3COO/CH3COOH:pKA1 = 3,8pKA2 = 4,8
VB (mL)
pH
2
1
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7/24/2019 Compo Trim2
2/2
2
))5
R = 1000 WC = 50mF.
.E = 12 V
K.
1
.
.uR2
:
0RR
duRC u
dt+ =)1(
0RR
duRC u
dt+ =)2(
(
.
.)
(
uR (t).
.Ec3
4 .C = 60mF
.Ec)
)
)5(
.L = 0,25 H))r
)1(:
.E = 6 V
K
I = 430 mA.
)2(
R = 10 W.
uR (t))3(
r1
uR2 (t)
r3
.r
4
[ 0 , 52 ms ]
.
K
E
R
C
E (L , r)
-1
A
K
-2
E
(L , r)
K
R
10,4
uR (V)
t(ms)
-3
2 5
