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1. Which of these are vectors? (a) The electric field. (b) The electric potential. 2. True or false?
1. Which of these are vectors? (a) The electric field. (b) The electric potential.
2. True or false? (a) The Faraday constant equals the charge per mole of electrons. (b) In this chapter, e stands for the charge on an electron.
3. True or false? (a) ∧m for a strong electrolyte in water decreases as the electrolyte concentration increases. (b) At low concentrations, к for a strong electrolyte in water increases as the electrolyte concentration increases. (c) к for a strong electrolyte in water always increases as the electrolyte concentration increases.
4. State whether each of the following is a molecular property or a macroscopic property: (a) µ; (b) a; (c) εr. Give the SI units of each of these properties.
5. For a current of 1.0 A in a metal wire with cross sectional area 0.02 cm2, how many electrons pass through a cross section in 1.0 s?
6. Calculate the charge on (a) 3.00 mol of Hg22+ ions; (b) 0.600 mol of electrons.
7. AgNO3 solution is electrolyzed with two Ag electrodes. Before electrolysis, in solution, there is 42 mmol AgNO3 per kilogram water. After electrolysis, there is 0.6 mmol Ag precipitate in Silver coulometer. In anodic region, there are 22 g water and 1.2 mmol AgNO3. Calculate t (Ag+) and t (NO3-).
8. Two coulometer were cascaded in circuit. One is Silver coulometer, and the other is Copper coulometer. How much mol of silver and copper were precipitated on the two coulometers respectively when quantity of electricity of 48250 C passed through the circuit?
9. The solubility product for AgI in water at 25°C is 8.2ⅹ10-17. Use data in Table 7.7.1 to find εθ for the Ag-AgI electrode at 25°C.
10. Calculate the EMF (electromotive force) of the cell below,Zn∣ZnSO4 (b = 0.002 mol·kg-1) ‖ CuSO4 (b = 0.5 mol·kg-1)∣Cu
