Make Sodium Oxalate - Primary Standard for Analytical Chemistry
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- Опубликовано: 30 май 2023
- In this video we make a sodium oxalate, a simple primary standard for the standardization of potassium permanganate titrant.
The reaction is pretty simple. 120g of oxalic acid is dissolved in 300mL of boiling water and mixed with 80g of sodium hydroxide dissolved in 200mL of water. The sodium oxalate precipitates out and is allowed to cool. It is filtered and dried.
Sodium oxalate will be used in an upcoming video to standardize potassium permanganate solution that will in turn be used to titrate hydrogen peroxide.
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Admittedly this video is rather simple, but my next video will be on finding the concentration of hydrogen peroxide by titration. To do that we need to standardize the titrant using the sodium oxalate we make here.
Why not just add KI and measure the volume?
The KI itself will need to be standardized.
Simple or not, the way you explain chemistry is better than any chemistry teacher I've had
Dear NurdRage, I think a very important thing as you dab into analytical chem, would be to talk a bit about error of method and obtained result. It would be nice to see a comparison of how big is error with titration, titration with standardized reagents, and some other widely used methods in home chem, like measuring the volume of oxygen from decomposition. I am curious how much +/-% would result from volume compared to proper titration. And this can also open home chem eyes to proper analysis.
This should be quite different from the usual youtube chemistry video where a guy carefully measures an amount of 10 year old reagent of questionable purity on a kitchen scale, throws the majority of it in a beaker (except for what spills off the paper onto the floor) and then "calculates" that the resulting reaction was 12.456785049560% efficient from the poorly washed and recryltalized product! LOL
Great to see your new video!
I hope the community will appreciate the PROPER analytic approach. A good starting standard is crucial to get exact results. And people should be glad to see a way to experimentally determine the exact concentration of hydrogen peroxide, especially as some are concentrating it by themselves. Great idea NurdRage btw!
It is good to see you making videos again, you are the best chemistry channel on youtube :)
I don't always fully understand what your videos are about, but I am able to understand enough of it. Thank you for making these and increasing my knowledge.
Ah here we go something to do with oxalate and it has to do with standards
Perfect for me to learn and this is relevant to my anchem course
Thank you for the method! Our analytical lab is overloaded, so I was looking for the way of determining h2o2 concentration, and here it is!
Feels good to see a new Nurdrage video.
One of your first videos I watched was "make potassium permanganate" and it quite literally (with no exaggeration) changed my life... and I love a nice titration... so I'm really looking forward to the next video.
Thanks Nurdrage - analytical techniques are a wonderful idea for a series.
It's so fun seeing liquids just turn into powdery stuff like that, chemistry is still an amazing thing to watch happen... :)
Not trivial at all, love ❤️ your content and look forward to the titration videos. Have learned much from you over the years and appreciate your efforts.
Simple yet polished videos like this are amazing. Honestly, I love anything you put out as I always find I'm learning something.
I'm so so glad to see a video from you, this channel is one of the first ones o subscribed to after creating a YT account, and you fueled my love for chemistry during my middle and highschool years, i hope you're around for much longer, cheers!
Your content is invaluable to chemistry enthusiasts! Thank you and welcome back!!!!
Always so happy to see videos from you. Been watching for years. Just saw a synthesis on pyrimethamine and it made me think of you.
Thanks for another quality video, they're really appreciated!
Gotta love the cleanliness of your analytical setup =P
If you want to avoid bubbling with the sodium carbonate, pour the oxalic acid into the carbonate so only bicarbonate is formed, not the carbonate into the oxalic acid which results in going all the way to CO2. If you want high quality sodium carbonate, bake some baking soda in the oven.
Yay, more upcoming videos by NurdRage~!
Fantastic... content from NR.. great work.. a class mate.. respect from far north Queensland, Australia 🇦🇺... very useful reaction. Cheers.
Cool video. You definitely bring new possibilities to life.
Beats watching old vids or new vids of old done to death preps .
Just glad you are back .
Welcome back my man. Have fun
Wow, glad to see you again on youtube
Even us amateurs need to know. Your videos have brought me back to the craft.
Yay! Analytical Chemistry!
Thank you for doing this!
Keep on keeping on.
Awesome video! Other than college did all the chemistry in dry labs. You post such useful and informative videos though! Thank you for your work!
Great seeing you coming back ! Thank you ! Could you show one day, how to make H202 in different ways ?
Yeah, NurdRage is back!
He's back!
Awesome video!
Thank you!
Fruitful information
Though it is a simple video it is still great! Keep up the good work!
Great to see a new video.
I've got the same scale (00:29). It seems accurate enough... but it's definitely not great below 0.1g.
Wellcome back❤❤❤
Nice video! I am looking forward for next video, not many people do analytical chemistry.
As a side note - I personaly never had issues with using oxalic acid as primary standard.
New nurdrage YIPPEEEE 🎉🎉🎉
We need more!!!
4:05 dat scale just said "NOPE! I AIN'T PLAYIN WITH YOU ANYMORE"
Thanks for sharing
Very interested
Looking forward
Thanks again
Always a great occasion to see what you’ve been up to again beautiful.
Excellent. I have some H2O2 of unknown concentration (been concentrating it with P2O5) that I'd like to titrate.
not even a chemist but love chemistry and the video
Nice,hope to see others and maybe update on gold silver reduction please.
"Urtitersubstanz" (in German), like Sodium Oxalate, Potassium Bromate, Arsenic (III)-oxyde, Amidosulfonic Acid etc.
Welcome back :)
welcome brother
I love how just a few drops of permanganate will color a entire gallon of water but it just disappears into solution in this reaction
Pls do a video to make potasium pergamate!
Wake up babe, new NurdRage video
melting point apparatus also can be used to confirm the purity
some supervisors rather fork out some hard earned money to buy standard reagents than making it this way
Thank you for the video! If I want to detect lead in alloys (possibly around 50% but would be neat to do lesser too), would sodium rhodizonate be a good pick? If I can't get it, is it feasible for an amateur to make it from inositol and nitric acid? I'd be grateful for any ideas for the lead detection, I want to make sure that if I import goods that they actually comply with RoHS, for instance by using unleaded solder.
Crazy looking back how fast it seems time went. Still remember watching the pig heart in liquid nitrogen like it was just a 2 years ago 😩
Welcome back :D
Big question. Can you tell me how to make a cheaper Evapo-rust substitute? Are there any commonly available components that could be used to make up a substitute?
After 2 months of no chems, it was time to go to lab!
There's a big analytical chemistry shaped gap in youtube chemistry, ngl, seeing this is pretty nice.
Could the sodium oxalate be precipitated out using sodium chloride? Or would the accumulation of chloride ions, or the continuing presence of H+, interfere? Or is is just that the resulting solution of hydrochloric acid is more trouble to dispose of than the mostly-only-water left when using sodium hydroxide?
Hi sir how to make anti iron coin or how to make 2.4 blub without set chemical reactions burning filmymeet
How impure is the purple stuff? Just noticed it at the depot in the plumbing for water treatment or something.
Can it stay purple as a pigment or is that conversion to black the only thing?
Probably a bad idea to stain wood with it. Might burn a bit faster than you'd like if you had to run for yr life from it.
Potassium permanganate can decompose to manganese dioxide, which is brown by itself and can be hard to notice in the middle of a dark purple solution. That colour is very intense and can be achieved even with fairly low concentrations of pot. permanganate.
And wood staining with KMnO4 is not a good idea because it would react with the wood and decompose, again, to brown manganese dioxide... and, well, brown over wood doesn't look that great
Thought you were going to oxidize ethylene glycol
Huh, I didn't expect the sodium salt to be less soluble than the corresponding acid. That's unusual!
If you're doing the titration based on amount of permanganate added, wont you get inaccuracies from the manganese 2+ product catalyzing decomposition?
No. On the other hand Mn2+ acts as catalyst for the reaction.
@@bedlaskybedla6361 that's what I just said
@@jogandsp Mn2+ acts as catalyst for oxidation of H2O2 or Na2C2O4 by permanganate. In the case of oxalate it is actually advantageous to add some MnSO4 before the titration and heat it up. Otherwise the reaction is painfully slow.
@@bedlaskybedla6361 but Mn2+ would likely independently catalyze the decomposition of hydrogen peroxide. Most transition metal salts do to varying degrees.
@@jogandsp That's true, but that reaction isn't that fast. Titration is done way before H2O2 can decompose to some measurable amount. Error by this reaction is insignificant.
I wonder what it tastes like ?
Hey hey!
It's a pity that you are not open for a discussion with Peter & Pete: your channel, and theirs, are the two most advanced chemistry channels in youtube, in my opinion. Both very practical, and with extensive experience.
Amazingly oxalic acid seems to have been banned here recently.
Is this the same stuff that gives you kidney stones !? How much would it take to put you at risk of getting kidney stones!?
as long as you ingest none youre fine
Show us how to make potassium metal.
Again.
Uplode +2000%
How many brazilians are watching this video?
:((( u shouldnt see brown color when doing the titration, ruins the result. add more Mn2+ ions or heat it up.
i'm not doing the titration in this video, i'm making sodium oxalate.
Titration without a burette isn't very accurate...
Speak English?
You're the best.
NO NOTIFICATION WAS SENT YO ME!!! WTF RUclips!!!!!!!
I found this paper very interesting: nvlpubs.nist.gov/nistpubs/jres/15/jresv15n5p493_a1b.pdf