Is percentage purity always calculated using moles??

I calculated it using mass and got a completely different answer :/

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Shut up Jesse, you don't know what you're doing. I am the cook.

You've found the percentage of iron in the sample of hydrated iron sulfate, that's not the same thing as purity :p:

Shut up Jesse, you don't know what you're doing. I am the cook.

Original post by EierVonSatan

You've found the percentage of iron in the sample of hydrated iron sulfate, that's not the same thing as purity :p:

How do I go about calculating it ?

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How do I go about calculating it ?

Multiply the moles of Fe²⁺ you've calculated by the M_r of FeSO₄.7H₂O - not just iron :smile:

Original post by EierVonSatan

Multiply the moles of Fe²⁺ you've calculated by the M_r of FeSO₄.7H₂O - not just iron :smile:

what was the answer sorry? :smile:

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