Reduction potentials magnesium

The lanthanides are rather reactive metals, and a good indication of their ease of oxidation and reduction can be seen by considering their reduction potentials. For comparison, the reduction potentials for magnesium and aluminum are as follows ... 

The trend shown by the standard reduction potentials lor the reductions of sodium, magnesium and aluminium ions to their respective metals... 

Zinc metal is produced by reducing ZnO with coke, and magnesium metal is produced by the electrolysis of molten MgCl2. Look at the standard reduction potentials in Appendix D, and explain why magnesium can t be prepared by the method used for zinc. 

Answer Again, notice the single element as a reactant and a solution of an ionic compound as the other reactant. These are clues for a replacement. You should check to make sure that magnesium is capable of replacing silver in solution. A quick glance at the reduction potentials indicates that it will easily replace silver, so the reaction should be completed ... 

Electrowinning of metals in aqueous solutions is applicable to those metals that possess high electrochemical reduction potentials, such as silver, copper, cadmium, and zinc. Magnesium, aluminum, and sodium, like other reactive metals, are electro-produced from molten salt baths, such as NaCl/CaCh mixture at ca. 600 °C for sodium and MgCl2/NaCl/CaCl2 eutectic mixture at ca. 750 °C for magnesium. 

Although some first-row transition metals are rather unreactive, the lanthanides are quite reactive and are easily oxidized. This is illustrated by a comparison of the reduction potentials for lanthanum, magnesium, and sodium ... 

The oxidative-reductive transmetallation can be carried out with organometallic reagents that have a reduction potential more positive than magnesium ( — 2.375 V). Since these reactions are typically carried out with organomercury derivatives, there is a major environmental issue with formation of Hg , resulting in this method rarely being used, even in the laboratory. 

A different way of preventing iron corrosion is to use a sacrificial anode. A comparison of the standard reduction potentials of iron and magnesium... 

The standard reduction potentials are -1.798 for the uranium half-reaction and —2.714 for the magnesium half-reaction, (a) Will this semp work spontaneously (b) Calculate the voltage produced by this cell as written. 

---