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6Electric current in solutions and fused electrolytes. Law of Electrolysis.docx
Formative assessment questions
1. Calculate the number of mole of copper produced in an electrolytic cell if a current of 5.0 A at a voltage 6.0 V flows through a solution of copper ions for 10 minutes.
2. Calculate the time taken to deposit 1.00 g of copper onto an object that is placed in a solution of copper nitrate, Cu(NO3)2, and has a current 2.50 A flowing through it.
3. In an operating Hall-Heroult cell, a current of 150 kA is used at 5.0 V. Calculate the mass of aluminium that would be produced if this cell operates continuously for 1 day.
4. The electrolysis of a solution of chromium ions using a current of 2.2 A for 25 minutes produced 0.60 g of chromium. Calculate the charge on the chromium ion.
5. Calculate the masses of metal produced when 600 Faraday of charge is used to reduce the ions of aluminium, siler and zinc.
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