HamChem

A Tech Ed. Teacher at the school I teach at thought he came across some "silver soldering" material. He said it used to be used years ago, now has been replaced by the stereotypical magnesium compound. He asked me a way to determine if it is silver or a silver compound. Any ideas on how to determine this? I suggested a simple flame test. Any other suggestions? (It is shaped like a rod.) Please respond. Thanks

Could someone help me with this AP Chem type question on how to solve it... "A steady electric current is passed through molten MgCl2 for exactly 1.00 hour producing 243 g of Mg metal. If the same current is passed through molten AlCl3, for 1.00 hour, the mass of Al metal produced is closest to... a.) 27.0g b.) 54.0g c.) 120.g d.) 180.g e.) 270.g Help me out if you can!!