Magnesium can be extracted by electrolysis of salts derived from sea water (3.5 wt% salts and 0.13 wt% Mg), or, better, from salt lakes such as the Dead Sea (34.2 wt% salts and 3.4 wt% Mg) or the Great Salt Lake (27 wt% salts and 1.1 wt% Mg). The electrical energy necessary to electrolytically extract 1kg of magnesium from pure salt (water free) is 40 kWh. Assume the salt is purified from a similar osmosis step as in question 1. What is the total energy cost to create a kg of Mg from seawater vs. the concentrated brine of the Dead Sea