Obliczenia: |
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teperatura T=180C |
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Masa Na2SO3 [g] |
0,10215 |
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ciśnienie p=1025,6hPa |
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Objętość roztworu Na2SO3 [cm3] |
10 |
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Masa molowa Na2SO3 [g/mol] |
126,05 |
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Liczba moli Na2SO3 [mol] |
8,104E-04 |
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Stężenie roztworu [mol/dm3] |
8,104E-02 |
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napięcie -E [V] |
bez Na2SO3 |
ilość dodawanego Na2SO3 [cm3] |
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0,2 |
0,4 |
0,6 |
0,8 |
1 |
1,2 |
1,4 |
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natężenie [mA] |
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0,05 |
2,0 |
3,0 |
2,0 |
0,5 |
0,0 |
0,0 |
0,0 |
0,0 |
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0,10 |
3,5 |
4,0 |
2,5 |
0,5 |
0,0 |
0,0 |
0,0 |
0,0 |
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0,15 |
5,0 |
5,0 |
3,0 |
1,0 |
0,0 |
0,0 |
0,0 |
0,0 |
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Dane do 2 wykresu |
0,20 |
9,5 |
7,0 |
4,0 |
1,0 |
0,0 |
0,0 |
0,0 |
0,0 |
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0 |
122,0 |
0,25 |
14,0 |
9,5 |
6,0 |
1,5 |
0,5 |
0,0 |
0,0 |
0,0 |
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0,2 |
83,0 |
0,30 |
19,5 |
12,0 |
8,0 |
2,0 |
1,0 |
0,0 |
0,0 |
0,0 |
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0,4 |
58,0 |
0,35 |
25,0 |
16,5 |
11,0 |
2,0 |
1,0 |
0,0 |
0,0 |
0,0 |
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0,6 |
12,0 |
0,40 |
32,0 |
20,5 |
14,0 |
2,5 |
1,5 |
0,0 |
0,0 |
0,0 |
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0,8 |
6,0 |
0,45 |
39,0 |
25,0 |
17,0 |
3,0 |
1,5 |
0,0 |
0,0 |
0,0 |
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1 |
4,0 |
0,50 |
47,0 |
32,0 |
22,0 |
4,0 |
1,5 |
0,0 |
0,0 |
0,0 |
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1,2 |
4,0 |
0,55 |
54,0 |
37,0 |
26,5 |
5,0 |
1,5 |
0,0 |
0,0 |
0,0 |
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1,4 |
4,0 |
0,60 |
62,0 |
44,0 |
31,5 |
6,0 |
1,5 |
0,0 |
0,0 |
0,0 |
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0,65 |
72,0 |
50,0 |
36,0 |
6,5 |
1,5 |
0,0 |
0,0 |
0,0 |
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0,70 |
81,0 |
58,0 |
41,5 |
7,5 |
2,0 |
0,0 |
0,0 |
0,0 |
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0,75 |
90,0 |
65,5 |
46,0 |
8,0 |
2,0 |
0,5 |
0,5 |
0,0 |
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0,80 |
102,0 |
71,0 |
51,0 |
9,0 |
3,5 |
2,0 |
1,0 |
1,0 |
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0,85 |
110,0 |
76,0 |
54,0 |
11,0 |
4,0 |
3,0 |
2,5 |
2,0 |
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0,90 |
122,0 |
83,0 |
58,0 |
12,0 |
6,0 |
4,0 |
4,0 |
4,0 |
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0,95 |
129,0 |
88,0 |
62,0 |
14,5 |
9,0 |
5,0 |
5,0 |
4,5 |
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1,00 |
138,0 |
94,0 |
66,0 |
18,0 |
13,0 |
7,5 |
8,0 |
6,0 |
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1,05 |
144,0 |
99,0 |
68,0 |
24,0 |
17,0 |
12,0 |
12,5 |
9,0 |
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1,10 |
-- |
108,0 |
76,0 |
31,0 |
24,5 |
17,0 |
18,0 |
14,0 |
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1,15 |
-- |
110,0 |
82,0 |
40,0 |
31,5 |
25,0 |
23,5 |
19,0 |
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1,20 |
-- |
111,0 |
90,0 |
53,5 |
42,0 |
35,5 |
36,0 |
29,0 |
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Dalsze obliczenia: |
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a) |
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Liczba cm3 tlenu rozpuszczonego w 1 dm3 wody |
6,61 |
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Liczba cm3 tlenu rozpuszczonego w 50 cm3 roztworu KCl w warunkach doświadczenia |
0,3305 |
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1mol gazu znajduje się w 22,4dm3 |
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pV=nRT |
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n=pV/RT |
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to w 0,3305 cm3 jest x moli O2 |
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x=0,3305/22400= |
1,475E-05 |
mol |
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n |
1,401E-05 |
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Liczba moli tlenu rozpuszczonego w 50 cm3 roztworu KCl w warunkach doświadczenia |
1,475E-05 |
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b) |
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zachodzi reakcja |
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O2 + 2SO32- ---------> 2SO42- |
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Teoretyczna liczba moli Na2SO3 potrzebna do związania O2 rozpuszczonego w roztworze KCl |
2,951E-05 |
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2,802E-05 |
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c) |
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Z wykresu I=f(VNa2SO3) wyznaczam punkty równoważnikowy |
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PR |
0,6 cm3 |
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Liczba moli i objętość w cm3 O2 związanego w trakcie miareczkowania |
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roztworu Na2SO3 |
O2 |
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roztworu Na2SO3 |
O2 |
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cm3 |
mole |
mole |
cm3 |
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cm3 |
mole |
mole |
cm3 |
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0,6 |
4,862E-05 |
2,431E-05 |
0,5446 |
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0,6 |
4,862E-05 |
2,431E-05 |
0,5735 |
d) |
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Objętość tlenu, która przeszła z atmosfery do roztworu od momentu rozpoczęcia miareczkowania do czasu kiedy został osiągnięty punkt równoważnikowy (różniza wyliczonych objętosci z punktów c) i a)) |
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VO2 |
cm3 O2 |
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VO2 |
cm3 O2 |
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PR |
0,2141 |
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PR |
0,2430 |
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Wielkość powirzchni granicy faz: powietrze-roztwór |
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średnica powierzczni |
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d=4,81867 cm |
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powierzcznia obliczona ze wzoru S=P*d2/4 |
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S= |
18,2274 |
cm2 |
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Czas osiągnięcia E=-0,9V po dodaniu 0,6 cm3 Na2SO3 wynosi 4020 sekund |
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szybkość przenikania dana jest wzorem |
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v=VO2/(S*t) |
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v= |
6,750E-06 |
cm3/cm2*s |
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v= |
7,662E-06 |
cm3/cm2*s |
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