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Sodium Hydroxide 10 % Solution: Lye Weighed into Water
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Charlie

14. Ukwakira 2026DE
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Sodium Hydroxide 10 % Solution: Lye Weighed into Water

Many recipes call for caustic soda as a 10 % solution, not as solid lye: for scouring and mercerising cotton, soapmaking, cleaning metal before anodising. It is 100 g of sodium hydroxide in every 1,000 g of solution. Dissolving it gives off a lot of heat, so the lye goes into cold water slowly.
Utangiye
Half an hour

Amabwiriza

1

Weigh

For 1 kg of solution weigh 100 g of solid lye and 900 g of cold water (see the notebook for other amounts).

Ibikoresho by'iyi ntambwe:

Umunyu w'umuriro (hydroxyde ya sodium)Umunyu w'umuriro (hydroxyde ya sodium)100 g
AmaziAmazi900 g

Ibikoresho bikenewe:

Umunzani w'ibiroUmunzani w'ibiro
Igikombe cya BorosilikateIgikombe cya Borosilikate
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

Lye into water, slowly

Add the lye to the water a little at a time, stirring, never water onto lye. It heats up strongly and can spit: goggles and gloves on.

Ibikoresho bikenewe:

Igikombe cya BorosilikateIgikombe cya Borosilikate
Akati k'Ikirahure ko KuvangaAkati k'Ikirahure ko Kuvanga
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
3

Cool and bottle

Let it cool to room temperature and pour it into a labelled plastic bottle with a tight cap: lye slowly etches glass and takes up carbon dioxide from the air.

Ibikoresho bikenewe:

Icupa rya pulasitikiIcupa rya pulasitiki
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
4

Weighing other amounts

Gupakira ikaye ya Jupyter…

Ibikoresho

2

Ibikoresho bikenewe

6

Iki gishushanyo gikora

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Agateganyo

Hidorogiside ya sodiyumu, umuti wa 10 %

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Sodium Hydroxide by Causticizing Soda Ash with Slaked Lime

Sodium Hydroxide by Causticizing Soda Ash with Slaked Lime

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