What's the difference between Heavy Metal, Black Metal, Death Metal, and Melodic Metal?
This problem is straight-forward if you simply concentrate on the metal...avoid superfluous calculations...KISS comes to mind :-)) I shall assume that you omitted 'liter' in the metal ion conc...should read 0.43mols/liter. Which means that the 100 ml soln you made up from all the salt produced contains 0.043 mols metal. This same soln also contains 2.2g metal (6.8g salt - 4.6g chlorine). So the atomic mass of the metal is 52 g/mol (2.2g/0.043mols) Consulting the Periodic Chart shows Cr, chromium, is the only metal possible...QED So the metal is chromium, and the salt is chromic chloride, CrCl3 If you want to check this answer calc % metal in the salt you obtained [100x2.2/6.8 = 32.4%]....and in CrCl3 [100x52/(52+3x35.5) = 32.8%]...close enough agreement since you really only have two sig figures to work with. These problems are easy if you stay focused...right? :-))
