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I have a box of iodised table salt which contains 40–60 miligrams of potassium iodate per kilogram of salt. How can I separate a potassium salt from this mixture? (It doesn’t matter whether the potassium iodate is preserved; I just want to isolate any potassium salt.) Any means of separation are OK, be they chemical or physical. Can you help me please?
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Shameless self-bump
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The melting point of KIO3 is lower than that of NaCl. You might be able to separate it this way.
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>>8563513
Okay, I hope this might work.
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>>8563497
Glycerine and Propylene Glycol dissolve sodium chloride but not KCL and KI.
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>>8563497
>asking 4chan about chemistry
just asking for trouble
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>>8563497
Look at the solubility curve for both salts and you might be able to use crystallisation
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>>8563497
>40-60mg per kg
You're not going to get any significant amount....
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>>8563518
Keep in mind NaCl is highly volatile and tends to explode.
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>>8563497
Differential solubility. Hot water, cool and remove crystals that form. These will be either enriched or reduced in the target compound. Repeat as required.
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Clinoptilolite and starch?
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>>8566070
This is the best idea so far, given how hard it would be for the layman to exploit melting point differences.
Ideally though, we'd want to find a solvent that will dissolve KI but not NaCl, since it could likely be accomplished with significantly less solvent. Plus, if KI has even minor solubility in PG or glycerol, you're gonna have a bad time.
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