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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.
Olùbẹ̀rẹ̀
Half an hour
Ìlànà
1
1
Weigh
Weigh
For 1 kg of solution weigh 100 g of solid lye and 900 g of cold water (see the notebook for other amounts).
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ẹ̀fun onídìí (sodium hydroxide)100 g
Omi900 gÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Ago Bórósílíkéètì
Gílásì Ààbò Fún Ìfọ́n Kẹ́míkà
Ìbọ̀wọ́ rọ́bà2
2
Lye into water, slowly
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.
Àwọn irinṣẹ́ tí a nílò:
Ago Bórósílíkéètì
Ọ̀pá Ìrúwé GílásìGílásì Ààbò Fún Ìfọ́n Kẹ́míkàÌbọ̀wọ́ rọ́bà3
3
Cool and bottle
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.
Àwọn irinṣẹ́ tí a nílò:
Ìgò ikeGílásì Ààbò Fún Ìfọ́n Kẹ́míkàÌbọ̀wọ́ rọ́bà4
4
Weighing other amounts
Weighing other amounts
Ń ṣí ìwé Jupyter…
Ìtọ́nisọ́nà yìí ń ṣe
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