☰ Contents · Chemistry (General chemistry)

Faraday’s laws of electrolysis

Lessons 32 · 1 lessons · S. Masharipov, A. Mutalibov, E. Murodov, H. Islomova. General chemistry, Grade 11, 1st edition. G‘afur G‘ulom Publishing and Printing House, Tashkent, 2018
Answers are for parents and teachers.
1
A current of 15 A flows for 19 300 s. How many equivalents of electricity is this?
2
How many grams of Cu are deposited at the cathode when 10 A flows for 19 300 s through CuSO₄ solution (E = 32)?
3
How many seconds are needed to deposit 9 g of Al (E = 9) from molten Al₂O₃ with a current of 5 A?
4
The same Q deposits 216 g of Ag. How many grams of Cu are deposited by it in a CuSO₄ solution (E(Ag) = 108, E(Cu) = 32)?
5
Why can the real mass of released substance be smaller than the theoretical value?