Question

How many moles of Cl- ions are needed to completely combine with 0.25 moles of Mg+2 ions

Answer 1

The amount of Cl- ion moles needed to combine with 0.25 moles of Mg+2 ions is 0.50. The problem gives us how much Mg we're working with, 2. This means, we also need to use x's two of Cl to completely get a reaction.