I produced a solution of gadolinium chloride by neutralising the metal with 20% hcl solution. This is a rather quick process and generates allot of
heat.
I ensured the solution was ph neutral and set it up in a small duran bottle with a platinum wire anode and titanium cathode.
This was mostly a waste of time because I believe gadolinium hydroxide dropped out of the solution and coated the cathode stopping the circuit.
I believe this is the same way the magnesium salt reacts.yobbo II - 3-8-2024 at 14:53
Attachment: mag_chlorate-1.pdf (112kB) This file has been downloaded 74 times
bnull - 4-8-2024 at 06:15
Same reaction as magnesium, calcium, aluminum. The reduction potential for gadolinium(III) is very close to the one for magnesium (from the CRC
Handbook 97th):
$$Gd^{+3}(aq)+3e^-\leftrightarrows Gd(s)~~~~-2,279~V.$$
What was the purpose, by the way? Chlorate or electroplating?Chemgineer - 4-8-2024 at 10:57
Same reaction as magnesium, calcium, aluminum. The reduction potential for gadolinium(III) is very close to the one for magnesium (from the CRC
Handbook 97th):
$$Gd^{+3}(aq)+3e^-\leftrightarrows Gd(s)~~~~-2,279~V.$$
What was the purpose, by the way? Chlorate or electroplating?
Chlorate was the plan, i'm interested how volatile different chlorates are and the nice colours they produce.
I've seen the paper on producing magnesium chlorate before, it would be a 3D printoing project though to make the spinning cathodes!knowledgevschaos - 4-8-2024 at 17:29
What are the spinning cathodes?bnull - 5-8-2024 at 04:39
The cathodes are fitted to a motor which spins them like a drill bit. The name is amusing but that's exactly what they are. From the paper above
(Vasudevan et al., Electrolytic preparation of magnesium chlorate from magnesium chloride):
Quote:
The cathodes were cylindrical stainless steel rods of different dimensions (80mm (h) x 10 mm (dia.), 70.5 mm (h) x 15 mm (dia.) and 90 mm (h) x 25 mm
(dia.)). Depending on the parameters, each cathode was fitted to a rotating assembly and positioned at the centre of the celll.
Chlorate was the plan, i'm interested how volatile different chlorates are and the nice colours they produce.
Read the report below, suggested by @"The WiZard is In" back in 2011 (link updated). I was browsing the old threads in the forum and found it in a
thread about urea perchlorate. Preparations of many chlorates begin on page 104 (118 in the PDF).
Accession Number : AD0242192
Title : CHLORATES AND PERCHLORATES THEIR MANUFACTURE,
PROPERTIES AND USES
Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX
Personal Author(s) : WARREN, FRANCIS A. ; MILLAR, JOHN D.
Url : https://apps.dtic.mil/sti/tr/pdf/AD0242192.pdf
Report Date : 15 MAY 1960
