Question about unknown type of metal ion

[mjolnir80]

Homework Statement

we are mixing CuSo4 (Cu²⁺) with an iron (Fe) powder and we are trying to determine whether Fe²⁺ forms or Fe³⁺
now the question is :
suppose that 1.0 g of iron is used in the experiment. what is the minimum volume of Cu²⁺ solution that must be added in order to completely react the iron? should this calculation be based on the reaction of Fe²⁺ or Fe³⁺ with Cu²⁺?

Homework Equations

Fe(s) + Cu²⁺(aq) ---> Fe²⁺(aq) + Cu(s)
2Fe(s) + 3Cu²⁺ ---> 2Fe³⁺(aq) + 3Cu(s)

The Attempt at a Solution

are we supposed to determine which equation uses the least Fe? and if so how are we supposed to change that mass or moles of Cu2+(aq) into volume?
id really appreciate some help :)

 

[Borek]

You need molar concentration of copper sulfate to calculate moles.

 

[mjolnir80]

oops sorry to include that its a 1.0M solution cuso4

 

[Borek]

Show how you are approaching the question, it is relatively easy and I have no idea where and why do you get lost.