Subject: Preparation of Ammonium iron (III) sulphate (ferric alum)
Mar 11, 2011 · Ferric ammonium citrate is arguably far harder to synth than ferric ammonium alum. FAC doesn't even have a fixed composition. Many double salts I've made presented no problem at all: potassium alum, ammonium alum, Mohr's Salt and others are really straightforward... [Edited on 28-9-2012 by blogfast25]
Sciencemadness Discussion Board - Manganous-Ammonium alum …
Basically the patent gives details on preparing manganese-ammonium sulfate from ammonium sulfate, manganese sulfate, and 60% sulfuric acid. To oxidize the compound to the desired manganous ammonium alum (MAA), the mixture then has current passed through it in an undivided cell, using lead electrodes.
Sciencemadness Discussion Board - Ammonium Alum: simple …
Mar 2, 2008 · Ammonium Alum: simple synthesis from OTC materials Although originally referring to the potassium aluminium double sulphate (KAl(SO4)2.12H2O), once one of the most important sources of water soluble Al salts and precursor to the name ‘alumin(i)um’, alums are now considered a class of chemical compounds of the general structure MM’(SO4)2.12H2O where …
Ammonium dichromate - Sciencemadness Wiki
Nov 9, 2018 · Make chrome alum; Leather tanning; Handling Safety. Ammonium dichromate is flammable, oxidizer and a known carcinogen Storage. Ammonium dichromate should be kept in plastic containers, with a proper label and a hazard symbol. Keep it away from acids and open flame sources. Disposal. Can be reduced to Cr(III) using aqueous solutions of ascorbic ...
Author: Subject: Ferric Ammonium Alum problems
Mar 2, 2008 · The combined last batches or peroxide and nitric alum have been recrystallised (100 alum + 50 water) at 83.3 % crystallisation yield, this calculates to a solubility of about 30 g alum (dodecahydrate) /100 g of water at fridge temperature (just above 5 …
Author: Subject: ammonium alum and sodium carbonate
ammonium alum and sodium carbonate Hello i recently reacted some (NH4)Al(SO4)2 and sodium carbonate, i want to know what happened. Did the sodium carbonate reacted with the aluminum sulfate making alumimum carbonate and sodium sulfate, or did it react with the ammonia giving some other compouund?
Sciencemadness Discussion Board - Manganous-Ammonium alum …
Oct 2, 2007 · I hooked up the computer power supply I used for this project, and set the voltage to 5 volts. I chose this voltage because it's what I had used in the past to regenerate the manganous ammonium alum, and it has worked well. I switched on the power, and a dark red color, similar to that of the aforementioned alum, poured off of the anode.
Author: Subject: Preparation of Ammonium iron (III) sulphate …
Dec 12, 2013 · We know ferric ammonium alum comes in two colour variants but we don't really know why (it's been discussed elsewhere here). The colourless crystals in MrHS sample are FAA too, not ammonium sulphate. [Edited on 20-12-2013 by blogfast25]
Sciencemadness Discussion Board - Manganous-Ammonium alum …
Apr 12, 2014 · Sciencemadness Discussion Board » Fundamentals » Organic Chemistry » Manganous-Ammonium alum and derivatives for use of toluene oxidation to benzaldehyde
Author: Subject: Mini double mystery with Ferric Ammonium Alum...
Mar 2, 2008 · Mini double mystery with Ferric Ammonium Alum... Having ran out of NH4Fe(SO4)2.12H2O I decided to make about a 1/2 mol myself via: