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salts, electrolysis, 3 (Salze-87)
15 m² One of them Metal surface area to be with One of them 35 µm thick Manufacture from materials of any heading Coated will be. Chromes has One Density of 7.15 g/cm³.
a) Calculate The Weight Chromes, which discharged will be must.
b) The Separation occurred from One of them CrO₃ – Lthe island. How long must Electrolytic will be, where: The Power intensity 450 A and The Effectiveness 90% of which:.
Notes : Identical exercise also At the same time, Subjects redox

September 29, 2026 at 6:08 pm #9459

Lösung:

Notes: 35 µm corresponding to 35·10^-6m

This Volumes The to be imposed Manufacture from materials of any heading of which::
V= O·h = 15m^2·35·10^-6m = 0.000525 m³ = 525 cm³
With Density = m/V following::
m=Density·V= 7.15g/cm³ · 525 cm³ = 3753.75 Grams
CrO₃, Participants Ions: Cr⁶⁺/O^2-
Cr⁶⁺ + 6e^– → Cr, z = 6
m/M = I·t/(z·F)
t = m·z·F/(M·I) = 96485·6·3753/(52·450)
t = 92848 s (In the case of a Effectiveness of 100%)
Effectiveness of 90%: 103164 Seconds

by rainer steiger

Chemieaufgaben.ch