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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: lukas.stib on February 03, 2021, 09:48:30 AM

Title: Drying of ZnCl2 to anhydrous
Post by: lukas.stib on February 03, 2021, 09:48:30 AM

Helo chemists,

I want to ask you, at what temperature is it appropriate to dry ZnCl2 to the anhydrous form? At a melting point of 293°C of ZnCl2 it can be 200°C? I used it for Lucas´reagent with HCl, and now after the reaction when I made 2-chloropropane I got it solidified in a flask after about 2 hours of boiling to remove most of the water, and I want to get ZnCl2 back as anhydrous. It is strange that it is yellow-brown and glassy (photo).

And I want to ask you if I can dry it in a normal user oven? Will it not release harmful fumes? Pungent fumes were released during boiling, but I judge (since the vapor temperature was over 100°C and the plate was full, about 380°C) that ZnCl2 was also released. Unfortunately, I have no other oven.

Thak you, Lukáš S.

Title: Re: Drying of ZnCl2 to anhydrous
Post by: AWK on February 03, 2021, 10:06:27 AM

Search this Forum: anhydrous ZnCl2 and drying ZnCl2

Title: Re: Drying of ZnCl2 to anhydrous
Post by: lukas.stib on February 03, 2021, 10:23:02 AM

OK, thank you.

Title: Re: Drying of ZnCl2 to anhydrous
Post by: lukas.stib on February 03, 2021, 10:41:12 AM

So I found out I was unlucky. Zn(OH)Cl is formed, and drying is not easy for me. I disposed of it. I'll buy a new one.