Make MnSO4 from MnO2 [2 ways]

How to Make Manganese Sulfate from Manganese Dioxide. We'll show two ways on how to do this. One using sulfuric acid and oxalic acid, and another using sulfur dioxide.


First the manganese dioxide must be thoroughly washed and filtered to remove all soluble contaminants like zinc chloride and ammonium chloride.

In the first method 30grams of oxalic acid, 300mL of water, and 13mL of sulfuric acid are mixed together. Then the manganese dioxide is continually added until the solution stops bubbling.

In the second method. The manganese dioxide is mixed with water and an excess of sulfur dioxide is bubbled through. The reaction produces manganese dioxide directly.

Finally, after both methods. The mixture is filtered to give pink manganese sulfate.

This will eventually be used to make manganese dioxide electrodes.

[jogandsp]

I love coming back and rewatching all your old videos. I wish other people did the same. You deserve the views!

[NurdRage]

@johnschmeisser

what happens with almost all heavy metal salts: Pain, Suffering, and death

usually all 3

[NurdRage]

@pyropakman it's embedded with carbon particles. Nothing can be done really. Use your stir bars normally, they won't adversely effect your future reactions.

[Pliskkenn]

I love this channel. I love how each session seems to be relevant to later sessions.

[pyropakman]

@MWGrossmann: Thank you so much for the kind words! I'm happy that my questions address common problems/concerns that others have as well. Also, I am overjoyed to say that I did complete this experiment in its entirety a few months ago, and, as any good scientist, I made detailed notes in my Lab Notebook. I ended with beautiful pink crystals.

I hope to make a video on it sometime in the near future, detailing my exact procedure, complete with pictures of my final product. Thanks again!

[NurdRage]

@localbroadcast

My loss is negligible, but if it bothers you then just cut up the filter paper and toss it into the reaction mixture as well. It'll filter out when you filter the manganese sulfate.

[NurdRage]

@panzuman

To be honest i don't know. but i don't think it would very good since the sulfur dioxide might react with the rubbers, greases, seals or etch the metals.

I reccomend building a sealed burner container (a large paint can works) placing the candle inside, and then poking two holes in it. push air through one hole and lead the exit gas out the other hole and into the mixture.

Be careful though, explosion danger if sulfur vapor builds up.

[NurdRage]

@Serostern

No, the iron oxides are not all magnetic and they're not separate particles, but fused the manganese.

Can you extract iron from your blood with a magnet?

[NurdRage]

@Liberterianist

That does work, i tried it myself, but it's much harder to find the right ratio, it's not perfectly stoichiometric because you have a competing reaction of decomposition of hydrogen peroxide.

Also, oxalic acid is much cheaper and easier to handle than H2O2. You can buy it by the kilogram as wood bleach, there are no restrictions on it and very little danger assuming you don't eat it.

[sikidiki]

i totally don't understand all of this, but is very interesting to watch, i love these videos thank you.

[NurdRage]

@coolliger
Manganese dioxide is an older convention.
I admit it, I'm old.

The correct name is actually "Manganese(IV) Oxide"

"Manganese oxide" alone can lead to confusion as it does not distinguish between MnO or MnO2 or even Mn2O3.

So we use manganese dioxide to refer to it. just traditional that way.

[NurdRage]

@weldmaster80

Yup, an aspirator would be perfect. Although the outlet should still be outside or in a fumehood... don't want to inhale any of the waste gases.

[NurdRage]

@panzuman some types of cleaners have oxalic acid, you'll have to check the labels to make sure. I was told that a cleaner called "bar keeper's friend" has it. although i'm not sure.

[daanroelofs]

I don't understand a word you say but i LOVE watching this

[NurdRage]

@waskaman94

yes, but i found small amounts of remaining chloride contamination ruined the electrode making process. If you can ensure absolutely all chloride is gone then go for it.

[NurdRage]

@Astanize

you can use the bag, i found it unnecessary since it evaporates just fine on it's own.

That and i'm using my bag for other stuff at the moment. :)

[NurdRage]

@carambatsr

The sand has other things in it like calcium, mangesium, iron, aluminum and other fun contaminants.

I did try the first method (oxalic acid and sulfuric acid) on the sand, but it still came out yellow, indicating iron contamination. in addition i noted a floating organic contaminant as well. At that point i didn't bother as the sand was SO highly contaminated that it was worthless to me to continue.

So i never got around to testing the second method on the sand.

[ronritekinamatigai]

I successfully used citric acid instead of oxalic. I used the following process:
Add sulfuric acid (36%) to the battery paste, with a slight excess; stir it; then add citric acid in small portions. Reaction starts after 10-20 seconds, producing bubbles of CO2 and lots of heat.

[NurdRage]

@blackdogsociety

i need the chemicals to created bonded MnO2 right on the electrode surface by a chemical process. Raw powder MnO2 can't be bonded onto surface directly. So it must first be converted to a different chemical compound, and then converted back while on the surface.

[NurdRage]

@waskaman94

I prefer not to worry about it to begin with if i can help it. but if you think you can do it then go for it.