Chemistry problem pleas HELP!?

Question

what mass of NaCl contains the same total number of ions as 365g of MgCl2

a formula would be nice

thanks a bunch

♥godbless

Answer 1

MgCl2 --> Mg++ + 2Cl-  ==> 3 mol ions for 1 mol MgCl2

Likewise, NaCl contains two mol ions for 1 mol NaCl.

365 g MgCl2 x (1 mol MgCl2 / 95.3 g MgCl2) x (3 mol ions / 1 mol MgCl3) x (1 mol NaCl / 2 mol ions) x (58.5 g NaCl / 1 mol NaCl) = 336 g NaCl

Answer 2

GMW of MgCl2 is (24+35+35=94), so 365g is 3.9 moles when converted to ions = (3.9 x 3=11.7 equivalents)

11.7 equivalents of NaCl = 5.85 moles GMW of NaCl is (23+35=58),

so 58 x 5.85 moles -= 339.3 g.