# How to remove hydrate from Fe(NO3)3 . 9H2O?

I am currently in a dilemma where I need to have pure Iron (III) nitrate, but I have Iron (III) nitrate 9 hydrate in order to do a lab experiment where I investigate voltaic cell. I am pretty sure the hydrate will mess up the results, so I want to remove the hydrate to give $\ce{Fe(NO3)3}$. Is there any way for me to do this?

• What kind of voltaic cell would require an anhydrous salt? I thought they are mostly about water solutions. – Ivan Neretin Apr 20 '17 at 18:54
• Out of curiosity, is your voltaic cell going to be a wet cell? If so, account for the water. Even many "dry" cells have an electrolyte paste. – Ben Norris Apr 20 '17 at 18:55
• @BenNorris It is! What do you mean by accounting the water? Should I take note of the change in water levels? – idk wat else Apr 20 '17 at 19:26

For the ferric nitrate I recommend adjusting the temperate at 110$^\circ$C see wikipedia page