Magnesium metal is dissolved in HCl in 500mL Florence flasks covered with balloons. The moles of each reagent are changed in each flask in order to demonstrate the limiting reagent concept. In flasks ...

HCl leaching was effective in extracting 99% of magnesium from whole ore and after floatation. High pressure CO2 leach testing reported 40% recovery as magnesium carbonate.

All you have to do is heat a mixture of common silica sand and magnesium powder in a test tube. The magnesium steals the oxygen atoms from the silica, leaving elemental silicon.