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One of them. Shell with One of them Surface of 120 cm2 It should be by: electrolysis One of them Silver nitrate solution One 0.2 mm thick Silver transhipment received. Calculate The For that required Time, where: The Power intensity 10 A is. The Density of the Silvers and silvers of which:
10.5 g/cm3 .
Notes : Identical exercise also At the same time, Subjects salts.
Lösung: - · This Volumes The to of a thickness of Surface of which::
- V= O·h = 120cm2·0.02cm = 2.4cm3
- · With Density = m/V following::
- m=Density·V= 10.5/cm3 · 2.4 cm3 = 25.2 Grams
- · Silver nitrate: AgNO3, d.h. Ag+/NO–3
- Ag+ + 1e– → Ag, z= 1
- · m/M = I·t/(z·F)
- t = m·z·F/(M·I) = 25.2·1·96485/(107.9·10)
- t = 2253 s , about. 40 Minutes
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