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Hello there
I am trying to produce a solution with Fe³⁺:Fe²⁺ ratio of 2:1
How do I make it ? Do I prepare 2 M FeCl₃ and 1 M FeCl₂ and mix them or is there any other way of doing it.
Kindly help

[Borek]

Any combination of volumes and concentrations that yields 1:2 ratio will do, 2M and 1M solutions combined 1:1 look reasonably OK.

Beware: FeCl₂ is not stable and gets oxidized when stored. Best source of Fe(II) is Mohr's salt.

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Any combination of volumes and concentrations that yields 1:2 ratio will do, 2M and 1M solutions combined 1:1 look reasonably OK.

Beware: FeCl₂ is not stable and gets oxidized when stored. Best source of Fe(II) is Mohr's salt.

Hi there, thank you for your answer but it is still not clear to me. Did you mean that I should make 1 M solution of both and then mix them ?? or should I make the 2M and 1 M soultion and then mix them ?

[chenbeier]

The second one.

But do you need only the ratio 2:1 or do you need 2 M and 1 M in the same solution? If yes think again how to prepare this.

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The second one.

But do you need only the ratio 2:1 or do you need 2 M and 1 M in the same solution? If yes think again how to prepare this.

I just need a ratio of 2:1, 2 M and 1 M is not mandatory. Do you have any better idea of doing it ??