Answer Happy

Please do number 21, 22, 25, 26. Please verify if number 20 is
correct.
20 Enew CEO What happens to the potential of the following reaction when the concentration of Fe2+ is halved and the concentration of Mn2+ is doubled? 8H+ + NO + 5 Fe2+ - 5 Fe3+ + Mn2+ + 4 HO Decreases C) Stays the same Increases D) Cannot be determined with the given information 21. What is the potential of the following cell at 45°C? Ag (s) Ag+ (aq) || Ag+ (aq)[0.1 M]|Ag (s) A) 0.126 V C) 0.063 V B) 0.63 V D) -0.063 V 22. At which electrode is H2 in the electrolysis of water? (A) The anode (B) The electrode connected to the negative side of the battery (C) The cathode (D) Cannot be determined with the given information 23. At which electrode is H2 in the eleetrolysis of water? TA) The anede (B) The electrode connected to the negative side of the battery (C) The cathode (D) Cannot be determined with the given information 24. What is faraday? A A unit of current ©) A unit of charge B) A unit of energy D) A mole of electrons Given a solution with equal concentrations of the following species, using your chemical intuition, which one should plate first if the external potential is slowly increased from zero to larger values? (A) Na (B) LI (C) Al (D) Mg 26. Using your chemical intuition, what combination of elements would make a very powerful battery? (A) F and CI (B) F and Li (C) I and Fe (D) Cd and Fe