Magnesium metal is placed in contact with an underground steel storage tank to inhibit the corrosion of the tank because 1. magnesium has a lower...

Magnesium metal is placed in contact with anunderground steel storage tank to inhibit thecorrosion of the tank because1. magnesium has a lower oxidation poten-tial than iron.2. magnesium is cheaper than gold.3. magnesium metal is a better reducingagent than iron.4. magnesium functions as the cathode inthe electrochemical cell instead of the iron.5. magnesium has a higher reduction poten-tial than iron.