What condition must be met for a battery to be rechargeable? O The electrochemical reaction of the battery must be reversible. O Either its anode or its cathode must generate a gas as a result of the electrochemical reaction. O It must generate electricity via an acid-base reaction rather than via an oxidation-reduction reaction. O The battery must use liquid and aqueous solutions.

Using the table of half-reactions, write a balanced equation for a redox reaction where chlorine oxidies iron. Then write a balanced equation for a redox reaction where calcium reduces water to produce hydrogen gas.

The same amount of electricity (same number of moles of electrons) is used to carry out the electrolysis of PdCl2(aq) and AgN03(aq) solutions in separate cells. The masses of Pd and Ag produced were measured and compared. Which of the following is true about the mass Pd produced? A The mass of Pd produced is not related to the mass of Ag. B. The mass of Pd produced is approximately half that of Ag. C. The mass of Pd produced is approximately twice that of Ag. D. The mass of Pd produced is approximately the same as that of Ag.