Here's the question you clicked on:
kphilxo
The concentration of an aqueous solution of iron(II) chloride is 0.0550 M. What is the molarity of each ion in this solution?
write the formula down Fe(II) signifies that Iron is in an oxidation state of 2... so Fe2+ add as many chlorines as you need knowing that Cl is in the 7th group and so it is -1 Fe+2 Cl-1 -> Fe(II)Chlorine = FeCl2 FeCl2 dissociates in to -> Fe2+ + 2Cl- so if the solution is X M, then [Fe2+]= X M and [Cl-] = 2X M