Question

Write out the balanced equation for the reaction that occurs when Mg and Fe(NO3)3 react together. You do not need to make your subscripts smaller; just write them out at regular numbers. For example: Fe(NO3)3.

Answer 1

Mg has a 2+ charge
(NO3) has -1 charge

Like many elements, iron (chemical symbol Fe) can exist in more than one chemical form, or "oxidation state." The two most common forms for iron are Fe(II), in which the iron ion shares two of its electrons, and Fe(III), in which it shares three electrons.

since (NO3)3 would be a minus -3 Fe here would be 3+

so

Mg(2+) + Fe(NO3)3 <--> Mg(NO3)2 + Fe(3+)

balancing we get:

3 Mg(2+) + 2 Fe(NO3)3 <--> 3 Mg(NO3)2 + 2 Fe(3+)

Answer 2

How do you know which Iron ion this reaction deals with?

Answer 3

you can figure it out by knowing that it is bonded to 3 NO3- so -3 +3 = 0

so we are dealing with Fe(III)