# Question about unknown type of metal ion

1. Oct 9, 2008

### mjolnir80

1. The problem statement, all variables and given/known data
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+?

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

3. 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 :)

2. Oct 10, 2008

### Staff: Mentor

You need molar concentration of copper sulfate to calculate moles.

3. Oct 10, 2008

### mjolnir80

oops sorry to include that its a 1.0M solution cuso4

4. Oct 10, 2008

### Staff: Mentor

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

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook