Purification of Manganese Sulfate

How to purify manganese sulfate that's been contaminated with iron sulfate.

The process is called selective precipitation. By carefully controlling the amount of hydroxides in solution, we can precipitate out the iron hydroxides but leave manganese sulfate in the solution.

Category:

Science & Technology

Tags:

• Manganese
• sulfate
• purification
• chemistry
• electrodes
• science
• hho
• chlorate
• perchlorate
• electrochemistry
• cell
• electrolysis
• anode
• cathode
• electrolyte

[terawattyear]

Nurdrage, THANK you for making this video. I have been trying to get MnCl2 out of MnO2 (that I got from the same G*****6 vendor you did before I saw you show how bad it is). That stuff was SO iron contaminated I was just stuck. Your method for purifying MnSO4 works for MnCl2 as well. I'm looking at my clean pink MnCl2 right now! Funny, isn't it, the things that make a nurd happy?

[NurdRage]

@terawattyear thanks for watching! its good to know people still watch and appreciate these more obscure synthetic videos. :)

[JChem92U]

Why do you use paper towels as filters instead of coffee filters or filter paper? You noted on your video on making ammonium nitrate that the paper towels left impurities in the ammonium nitrate. It seems to me that paper towels offer much lower quality for only a small saving in price. Not to mention it doesn't look very professional. Is there a special reason you use paper towels?

[NurdRage]

@JChem92U Precisely BECAUSE its unprofessional and cheap and what most people would probably try it. By showing people the screw-ups and mistakes they'll likely make, they can anticipate them and work around them. If you notice in my TCPO video i used glass frit funnels, far superior to any filter paper. But i try to avoid using that because most people don't have and can't buy glass fritted funnels. Instead they use paper towels.

So i will too. :)

[NurdRage]

@Masterkan8 if that were true then you'd be able to

remove iron from your blood with a magnet.

[nikitofin]

you have the best voice in the world

[ScienceTry]

@elementcollector1 I think that you might have Nickel contamination. Nickel salts are green, while the precipitate of the Nickel (II) hydroxide you got quickly reacted with dissolved oxygen to make Nickel (III) Hydroxide on the surface of the particles, which is brown in colour. If my prediction is right, please use gloves while handling the solution as Nickel salts are carcinogenic.

[elementcollector1]

@NurdRage My MnCl2 is contaminated with something very strange. I started with a green HCl acid (which is already weird) and got a darker green mix. On addition of NaOH, a brown precipitate settled out. I have no idea what this is, or if it's even a manganese compound. How do I test for this?

[TeHKasperek]

I wanna be your lab assistant!

[toothpick93]

i wanna make manganese chloride but it is also contaminated iron, would this method of purifying the manganese salfate also work with the chlorides?

[starshock01]

could you initially wash with sodium bicarbonate to neutralize the acid before adding the strong base?

[lexichronicle2]

@discaras yes

I have been working with a big batch of the chlorides and they were absolutely FILTHY with iron chloride

I used KOH, since I have more of that to hand than NaOH, but his hydroxide idea works REALLY well for the simplicity of the equipment and chemicals

I will try to upload a video of it later if my computer can handle editing it