Hello to all of you,
I wanted to obtain a small quantity of ferric chloride (III), no ferrous
To do this, I contacted a concentrated HCL solution with iron powder (not
steel powder) for about 7 days: there was a release of H2 that I could
notice with a flame. When calculating my quantities, I used an excess HCL
(about 35% excess by mass) in an atempt to favor the ferric (III) over the
ferrous (II) chloride. Afetr about 7 days of reaction, I filtered the
solution since there was still a deposit of powder at the bottom of the
beaker (I believe the deposit was iron since the density appeared high based
on the quick settling time after stirring). I got a pale green solution
that I brought up in temperature to 95°C for evaporation. After 4-5 hours
at 95°C, I reduced the liquid volume of the solution by more than 50 %. The
solution was now brown with a bit of a beige deposit. There was probably
still some HCL in the solution during the evaporation based on the strong
and irritant smell of the fumes. After letting the solution cool for a day
on the counter, I obtained large pale green crystals, needle shaped.
Iremoved the crystals from the solution to let them dry in air.
Is this ferrous chloride (II)? My chemical dictionnary would suggest yes
becaus they say that ferrous chloride is green while ferric chloride is
brown. However, ferrous chloride is said to be deliquescent from the same
dictionary, it should therefore dissolve itself in the moisture that it
absorbs from the air, no? Unless tere was not enough time?
If it is ferous chloride, how cam I get ferric chloride? I got the
suggestion to treat the solid crystals (or in solution?) with chlorine, but
I do not have the gas available. Any other alternatives?
Thanks in advance...