Making boric acid
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- āđāļāļĒāđāļāļĢāđāđāļĄāļ·āđāļ 7 āļ.āļ. 2025
- In this video we are making boric acid from borax and hydrochloric acid. The stronger acid replaces the weaker one. Enjoy!
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I think the "water to acid" rule is mostly due to sulphuric acid. Quite a lot of acids are safe the other way round, HCl included. However, unless you are sure, it is always safer to err on the safe side and add acid to water (slowly). That keeps mass larger ie. less difficult to warm up.
Even with sulfuric acid I never had this problem. But with oleum that would be another level
Codys lab did a good video on adding acid to water vs water to acid.
@@THYZOID I'v tried it with 98% and it is violent. Even adding 98% acid to similar amount of water can get very hot, enough to burn fingers.
Better safe than sorry, as always.
I saw it. I might do something similar with concentrated acid added to solid NaOH soon
With 98%? Itâs not a huge difference to 96% H2SO4 which doesnât do this. Interesting
Yeah, Fumes from HCL can EASILY make the small screws on your glasses rusty in no time really!. I am quite confident that people wont hurt themselves when playing around with HCL as long as they stay near a sink with running water. I got 26% HCL in my eye once, about a drop or so, and it was really uncomfortable but i managed to find water to clean it out(i was OUTSIDE and had to clean my eye in a dirty river), so please use googles if you are far away from water as even this acid can eat away at your eyes enough to leave you in regret. I didn't get hurt that time, but one might if not careful. just like when you cook potatoes, Stay away from that boiling water as it will burn your skin off.
Hi, I am a student and I am very glad that you showed me how to make this solution, unfortunately there are few videos showing how to make it in a simple way. And lessons are lessons and still not enough to learn.
there is literally no simpler way to make it than what i showed. the only simpler and easier way would be to straight up buy it.
Thanks for the recipe, i was wondering if you had a roach problem that you made the stuff but nice ending ð
Great interesting video.. I put H3BO3 in my pools and it works great as an algeastat and a buffer reagent for the ph as well as other benefits to the pool water. The cost of tetra borate is more expensive or the same price as boric acid so getting 82% yield out of tetra borate > Boric acid conversion wouldnât be more cost effective then just buying boric acid in bulk correct?
Iâve seen boric acid online thatâs cheaper than boric acid. It all depends on where you look. Making boric acid is definetely less cost effective because of the added cost of HCl and a waste of time.
Interesting video, what are you going to use the boric acid for?
Soon Iâll make some trimethyl borate. More boric acid will be bought for that.
Edit:
Bought 500g of boric acid yesterday. Soon a big load of trimethyl borate will be synthesized.
â@@THYZOIDWhere is trimethyl borate used?
@@henrynyabuto4892 you can burn it to see a beautiful green flame. i got a video on that
Based *only* on the washing steps shown in your video, it seems that your boric acid is going to be highly contaminated with NaCl, so I wouldn't use it for any reactions where you need high purity. You need to wash it with more cold water a few times. Yes, you sacrifice some yield to gain higher purity.
recrystallisation would be ideal
@@THYZOIDAgreed.
Novice at chemistry here. While performing this reaction, I placed my acid in an ice bath and added the hot solution of borax in small increments. Precipitates formed quickly, but now I am questioning whether the borax simply precipitated from the drop in temperature. Would the reaction still occur or does it require the heating plate during the reaction? I expected the reaction to be exothermic so I was being a little cautious.
To be efficient all reagents should be dissolved before letting the boric acid precipitate to ensure a complete reaction.
@@THYZOID thanks for the reply! It sure showed during my results this morning. 20% yield is not even close...
What about contamination of your product with salt?
Salt is highly solvable in water. Most of it should remain in solution. For more purity you could perform a recrystallization.
"Erst das Wasser dann die SÃĪure, sonst passiert das ungeheure" Im Video wird das genau so gezeigt und das ungeheuer bleibt aus, wie machst du das?
das sprichwort ist fÞr die meisten sÃĪuren einfach schwachsinn. es trifft eigentlich nur auf konzentrierte schwefelsÃĪure (oder chlorsulfonsÃĪure, oleum und ÃĪhnliche sÃĪuren) zu da beim mischen so viel hitze frei wird, dass bei der zugabe von wasser zu schwefelsÃĪure das wasser anfÃĪngt zu kochen und schwefelsÃĪure aus dem behÃĪlter spritzt. wenn du wasser zum beispiel zu konzentrierter salzsÃĪure gibst passiert garnichts da die reaktion kaum exotherm ist.
Why can not the Boric acid soluble in cold solvent Is there a scientific answer
Boric acid is simply poorly soluble in cold water. I cannot explain it to you on a molecular level though.
@@THYZOID The doctor at the university asked me this H.W and wanted a scientific answer, and I find it difficult to answer
@@THYZOID mean, impure sample soluble in hot solvent but can not soluble in cold solvent why? I will be grateful for your reply
Solubility decreases as temperature decreases?
Great video, Thy. Boric acid among many other uses, will kill cockroache and the entire colony ððððð
I react boric acid with potassium hydroxide to make potassium tetraborate or potassium borax. I use it as a welding flux with my torch. It works good on its own
Iâve been a pyromaniac since I was 13 so Iâll watch the flame
I want to learn chemistry
good video...thanks
Near laminar flow
nice
Hii
Boric acid is boring.
lol