2) Corrosion is the oxidation of metals. Acids can also cause corrosion. Consider the metal solids: AI, Fe, Ag, Na, Co, Au and Ca. a) Rank these metal solids on how easily they are oxidized. (Hint: Consider their E°ex value.) Rank them from the easiest to oxidize to the hardest to oxidize. I b) Write the half-reaction for the reduction of H'. c) Which of these metal solids can be oxidized by acid, H'? Justify your answer

The half-reaction for the reduction of molecular oxygen to water is Select one: a. O2(g) + H2(g) → H20(). O b. O2(g) + 2H*(g) → H20() + 2e. Q ¯ → H2O(). c. O2(g) + 2H(g) + 2e d. O2(g) → H20(). e. O2(g) + H2(g) + 2e H20().

2. The reduction of aluminum ions occurs as: Al³+ (aq) + 3e → Al(s) After applying a certain amount of current through an electrolytic cell, 0.1328 g of aluminum is deposited at the electrode a. How many moles of aluminum metal has been deposited? b.How many aluminum atoms have been deposited? (Use Avogadro's number). c. How many electrons were required for the reduction of this much aluminum? d. If the electronic charge is 1.60 x 10-¹C, what is the total electrical charge used? e. If a constant current of 90 mA were applied, what was the time elapsed in seconds and in minutes?

Consider electrolysis of the mixture of two molten ionic compounds. What substance is formed at the cathode? O Pb (s) O Br2 (1) OK (s) O Cl2 (g) DC Power Supply + Molten salts KCI and PbBr₂