Wyniki pomiarów oraz tabela wyników: |
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Jakub Kupiński |
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ilość wody [m3] |
5,00E-05 |
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stała sondy [1/m] |
123,80 |
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NaCl |
KCl |
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B1 [m3/2/mol1/2] |
7,273E-03 |
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c [mol/m3] |
350,00 |
350,00 |
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B2 [m3/2/mol1/2] |
1,918E-04 |
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przew graniczne [ m2/W*mol] |
0,012645 |
0,014985 |
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Do obliczeń użyte zostały następujące zależności: |
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L(dośw)=(K/c)*L |
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L(teor)=L-(B1L+B2)*c^0,5 |
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L'=Lexp+bc , gdzie |
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L'=(L(dośw)+B2*c^0,5)/(1-B1*c^0,5) |
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Wielkości obliczone na podstawie wcześniej załączonego algorytmu: |
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zawartość dodawanego elektrolitu [m3] |
c [mol/m3] |
c1/2 [mol1/2/m3/2] |
L [S] |
L(dośw) |
L(teor) |
L' |
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NaCl |
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1,0E-06 |
6,8627 |
2,6197 |
6,940E-04 |
1,252E-02 |
1,190E-02 |
1,3275E-02 |
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2,0E-06 |
13,4615 |
3,6690 |
1,201E-03 |
1,105E-02 |
1,160E-02 |
1,2071E-02 |
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3,0E-06 |
19,8113 |
4,4510 |
2,210E-03 |
1,381E-02 |
1,138E-02 |
1,5154E-02 |
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4,0E-06 |
25,9259 |
5,0918 |
2,800E-03 |
1,337E-02 |
1,120E-02 |
1,4899E-02 |
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5,0E-06 |
31,8182 |
5,6408 |
3,350E-03 |
1,303E-02 |
1,104E-02 |
1,4720E-02 |
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6,0E-06 |
37,5000 |
6,1237 |
3,850E-03 |
1,271E-02 |
1,091E-02 |
1,4532E-02 |
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7,0E-06 |
42,9825 |
6,5561 |
4,340E-03 |
1,250E-02 |
1,078E-02 |
1,4447E-02 |
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8,0E-06 |
48,2759 |
6,9481 |
4,790E-03 |
1,228E-02 |
1,067E-02 |
1,4341E-02 |
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9,0E-06 |
53,3898 |
7,3068 |
5,200E-03 |
1,206E-02 |
1,057E-02 |
1,4215E-02 |
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1,0E-05 |
58,3333 |
7,6376 |
5,600E-03 |
1,188E-02 |
1,048E-02 |
1,4135E-02 |
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1,1E-05 |
63,1148 |
7,9445 |
5,970E-03 |
1,171E-02 |
1,039E-02 |
1,4045E-02 |
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1,2E-05 |
67,7419 |
8,2305 |
6,320E-03 |
1,155E-02 |
1,031E-02 |
1,3964E-02 |
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1,3E-05 |
72,2222 |
8,4984 |
6,660E-03 |
1,142E-02 |
1,023E-02 |
1,3906E-02 |
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1,4E-05 |
76,5625 |
8,7500 |
6,980E-03 |
1,129E-02 |
1,016E-02 |
1,3846E-02 |
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1,5E-05 |
80,7692 |
8,9872 |
7,280E-03 |
1,116E-02 |
1,009E-02 |
1,3783E-02 |
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KCl |
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1,0E-06 |
6,8627 |
2,6197 |
7,910E-04 |
1,4269E-02 |
1,420E-02 |
1,5059E-02 |
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2,0E-06 |
13,4615 |
3,6690 |
1,352E-03 |
1,2434E-02 |
1,388E-02 |
1,3498E-02 |
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3,0E-06 |
19,8113 |
4,4510 |
2,480E-03 |
1,5497E-02 |
1,365E-02 |
1,6898E-02 |
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4,0E-06 |
25,9259 |
5,0918 |
3,100E-03 |
1,4803E-02 |
1,345E-02 |
1,6386E-02 |
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5,0E-06 |
31,8182 |
5,6408 |
3,690E-03 |
1,4357E-02 |
1,329E-02 |
1,6100E-02 |
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6,0E-06 |
37,5000 |
6,1237 |
4,320E-03 |
1,4262E-02 |
1,314E-02 |
1,6156E-02 |
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7,0E-06 |
42,9825 |
6,5561 |
4,890E-03 |
1,4084E-02 |
1,301E-02 |
1,6110E-02 |
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8,0E-06 |
48,2759 |
6,9481 |
5,440E-03 |
1,3950E-02 |
1,290E-02 |
1,6097E-02 |
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9,0E-06 |
53,3898 |
7,3068 |
5,960E-03 |
1,3820E-02 |
1,279E-02 |
1,6076E-02 |
1,0E-05 |
58,3333 |
7,6376 |
6,440E-03 |
1,3668E-02 |
1,269E-02 |
1,6022E-02 |
1,1E-05 |
63,1148 |
7,9445 |
6,890E-03 |
1,3515E-02 |
1,260E-02 |
1,5961E-02 |
1,2E-05 |
67,7419 |
8,2305 |
7,330E-03 |
1,3396E-02 |
1,251E-02 |
1,5928E-02 |
1,3E-05 |
72,2222 |
8,4984 |
7,740E-03 |
1,3268E-02 |
1,243E-02 |
1,5879E-02 |
1,4E-05 |
76,5625 |
8,7500 |
8,130E-03 |
1,3146E-02 |
1,235E-02 |
1,5832E-02 |
1,5E-05 |
80,7692 |
8,9872 |
8,500E-03 |
1,3028E-02 |
1,228E-02 |
1,5784E-02 |
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Równanie Shedlovsky'ego przyjmuje postać: |
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L'=L(dośw)+bc , a więc dla elektrolitu: |
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a) |
NaCl |
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b= |
-0,000018 |
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L(dośw)= |
0,015183 |
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c |
'' |
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c^1/2 |
dośw |
teoret |
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0,8824 |
0,00033941 |
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0,93936148526539 |
0,00015691 |
0,00147 |
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1,7308 |
0,00040823 |
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1,31559872301549 |
0,00015199 |
0,001459 |
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2,5472 |
0,00045915 |
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1,5959949874608 |
0,00014771 |
0,00145 |
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3,3333 |
0,00050039 |
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1,82573272961844 |
0,00014358 |
0,001444 |
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4,0909 |
0,00053651 |
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2,0225973400556 |
0,00014068 |
0,001438 |
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5,5263 |
0,00059638 |
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2,35080837160327 |
0,0001353 |
0,001428 |
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6,8644 |
0,00064549 |
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2,62 |
0,00013067 |
0,001419 |
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8,1148 |
0,00071322 |
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2,84864880250269 |
0,00015208 |
0,001413 |
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9,2857 |
0,00075284 |
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3,04724465706316 |
0,0001517 |
0,001407 |
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10,3846 |
0,00078725 |
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3,22251454612698 |
0,00015072 |
0,001401 |
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b) |
KCl |
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b= |
-8,64767645161605E-06 |
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L(dośw)= |
0,016422725249485 |
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Wnioski i omówienie wyników: |
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W celu wyznaczenia L według równania Shedlowsky'ego do spożądzenia wykresów musiałem |
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odrzucić pięć pierwszych wyników gdyż odbiegały one od pozostałych dość znacząco( zaznaczone |
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są one kolorem szarym w tabeli zestawiającej wyniki). Wartości L(dośw) i L(teor) są do siebie |
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zbliżone choć nieco od siebie odbiegają. Może to być spowodowane niewystarczającym |
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wymieszaniem dodawanego elektrolitu, przez co nie w całej ojętości roztworu było identyczne |
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stężenie. W takim przypadku sonda rejestrowała inne przewodnictwo niż w rzeczywistości. |
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Dla roztworu KCl różnica między doświadczalnym, a teoretycznym jest znacznie mniejsza niż |
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w przypadku roztworu NaCl (widać to na dwóch ostatnich wykresach). |
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