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Hydrogen Peroxide 3 %: Barium Peroxide in Dilute Sulphuric Acid
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Charlie

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Charlie

14. Ukwakira 2026DE
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Hydrogen Peroxide 3 %: Barium Peroxide in Dilute Sulphuric Acid

Thénard first made hydrogen peroxide from barium peroxide; the improved way stirs the peroxide into sulphuric acid, which takes the barium out as insoluble barium sulphate. Titrate the clear liquid with permanganate to find its strength, dilute it to 3 %, the mild antiseptic and bleach, and keep it in a dark bottle. Even 3 % hurts the eyes. The picture: our diagram of the four stages.
Hejuru
A day

Amabwiriza

1

Peroxide into cold acid

Grind the barium peroxide to a paste with a little cold water. Stand a beaker of dilute sulphuric acid in ice and stir the paste in a little at a time. Stop while a drop of the liquid still turns blue litmus red: it keeps better slightly acid.

Ibikoresho by'iyi ntambwe:

Perokside ya bariyumuPerokside ya bariyumu150 g
Aside ya sulifuriki yorohejeAside ya sulifuriki yoroheje1 litiro

Ibikoresho bikenewe:

Isekuru n'UmuhiniIsekuru n'Umuhini
Umunzani w'ibiroUmunzani w'ibiro
Igikombe cya BorosilikateIgikombe cya Borosilikate
Inkono NiniInkono Nini
Utubuye tw'uruburaUtubuye tw'urubura
Akati k'Ikirahure ko KuvangaAkati k'Ikirahure ko Kuvanga
Urupapuro rwa litimusiUrupapuro rwa litimusi
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

Filter

Let the white barium sulphate settle and filter it off. The clear liquid is hydrogen peroxide in water.

Ibikoresho bikenewe:

Akayunguruzo k'Ikirahure Gafite UmugoziAkayunguruzo k'Ikirahure Gafite Umugozi
Urupapuro rwo KuyungururaUrupapuro rwo Kuyungurura
Igikombe cya BorosilikateIgikombe cya Borosilikate
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
3

Titrate a sample

Dissolve 3.161 g of permanganate to 1 litre in a volumetric flask. Pipette 1 mL of the peroxide into a flask with some dilute sulphuric acid and run permanganate in from the burette until the first lasting pink. Note the reading (step 5).

Ibikoresho bikenewe:

Perimanganate ya potasiyumu — KMnO4Perimanganate ya potasiyumu — KMnO4
Icupa ripima ubuniniIcupa ripima ubunini
Ipipete ifite ibipimo (ya Mohr)Ipipete ifite ibipimo (ya Mohr)
Ikirahure cya ErlenmeyerIkirahure cya Erlenmeyer
Bureti (y'ikirahure)Bureti (y'ikirahure)
Ikibano cya laboratwari (buretti/icupa)Ikibano cya laboratwari (buretti/icupa)
Aside ya sulifuriki yorohejeAside ya sulifuriki yoroheje
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
4

Dilute and bottle

Weigh the batch, stir in the distilled water the notebook gives, and keep it cool in a dark, closed bottle.

Ibikoresho by'iyi ntambwe:

Amazi YatunganyijweAmazi Yatunganyijwe0.1 litiro

Ibikoresho bikenewe:

Umunzani w'ibiroUmunzani w'ibiro
Akati k'Ikirahure ko KuvangaAkati k'Ikirahure ko Kuvanga
Icupa ry'ikirahure cy'umuhondoIcupa ry'ikirahure cy'umuhondo
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
5

Strength and dilution

Gupakira ikaye ya Jupyter…

Ibikoresho

3

Ibikoresho bikenewe

19

Iki gishushanyo gikora

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Agateganyo

Perokside ya hidorojeni (3 %)

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