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KimiB023 : Fizikālā ķīmija II

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Pie KI koncentrācijas 0,59 mmol L–1 25 °C temperatūrā elektroda reakcijas

I3

+ 2 e

→ 3 I

limitējošais strāvas blīvums jlim

uz platīna

elektroda  ir 32,1 μA cm

–2. Zināms, ka I3

difūzijas koeficients

ir 1,14·10

–9 m2 s–1.

Aprēķini difūzijas slāņa biezumu (mm) šādos apstākļos.

Pievērs īpašu uzmanību

mērvienību saskaņošanai!

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Aprēķini strāvas blīvumu (mA·cm-2) uz šī paša elektroda, ja tam tiks pielikts -165 mV virsspriegums!

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