Did you check this discussion?
https://www.physicsforums.com/threads/how-could-i-dissolve-iron-powder.219961/
You can check this also.
https://answers.yahoo.com/question/index?qid=20081105123112AA0DgJ2
Thanks Mr. Sumon, I already checked that link...but looking for more specific one
Iron has a very low solubility in circum-neutral pH, so you will need an acidic solution such as HCl or nitric acid.
To dissolve iron powder, I highly recommend you use 1.5N or higher morality HCl. To completely dissolve iron into HCl, you do need to heat at 100 oC for 24h or more. Teflon beaker or strong materials are recommended to use for dissolving iron powder, and heating solution. If you don't have heater, Fe powder can dissolve in HCl, but take the time, (at least 4 days or more than a week, it depends on desired concentration of iron that you would like to make).
The final solution will have a light green.
Nitric acid is not recommended to dissolve iron powder as making NO gas that is dangerous for you.
I have gotten succeeded by that way.
Good luck!
Is there any catalyst that we can use for rapid dissolve iron using HCL other than temperature ?
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