1. In an experiment, what volume of O2 (g) at 0oC and 760 mmHg is produced when 5 A of current is passed through a dilute aqueous solution of KCl for 5 minutes?
1. In an experiment, what volume of O2 (g) at 0oC and 760 mmHg is produced when 5 A of current is passed through a dilute aqueous solution of KCl for 5 minutes?
2. One of the most problems encountered. Molecular masses can be determined through electroplating. Determine the molecular mass and identity of a +2 metal, X, that plates 46.3g of X in 6.75 hours at a current of 2 A.
3. Solving time of electrolytic process. How long will it take for 1.25 L of a 1.0 M CuSO4 solution being electrolyzed with a current of 3.40 A to reach a concentration of 0.25 M?
4. Determining electrolytic activity in a dilute solution.
5. Determining molar mass by electrolysis. An electrolysis cell containing MSO4solution is operated for 1.0 hr at constant current of 0.200 A. If the current efficiency is 95%, and 0.399 g of MM plates out, what is the atomic weight of the element MM?
6. Electroplating stoichiometric problem give, a metallic object to be plated with copper is placed in a solution of CuSO4. What mass of copper will be deposited if a current of 0.22 amp flows through the cell for 1.5 hours?
0.39
7. Determining volume of a gas by electrolysis. What volume of chlorine gas at standard temperature and pressure is evolved when a solution of MgCl2 is electrolyzed using a current of 12.4 A for 1.0 h?
8. Mass determination by electroplating. What mass of copper metal is deposited if a 5.12 A current is passed through a Cu(NO3)2 solution for 10 hr.
9. Electrolytic process of determining molar mass. An electrolysis cell contains X3+ ions. When a 5.45 A current is passed through the cell for 2.16 x 103 s, 8.50 g of elemental X are formed. What is the molar mass of X and at which electrode does X appear?
10. Mass determination - what mass of PbO2 is reduced when a current of 5.0 A is withdrawn over a period of 2.0 h from a lead storage battery?
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