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ÀWỌN OHUN WÍWỌ̀
Calcium Iodide: Iodine Dissolved over Amorphous Phosphorus and Neutralised with Milk of Lime (Liebig, Thorpe 1912)
Iodine stirred into hot water over red phosphorus turns into hydriodic acid. Milk of lime turns that acid into calcium iodide, and the phosphorus leaves as an insoluble sludge.
Result: a solution of calcium iodide; boiled down, deliquescent needles; fused dry in a closed vessel, the anhydrous salt.
Source: Thorpe, Dictionary of Applied Chemistry vol. 1 (1912), p. 604, after Liebig (Annalen 121, 222). Not given: water for the milk of lime. Picture drawn by Youblob.
Àárín
1 day
Ìlànà
1
1
Phosphorus under hot water
Phosphorus under hot water
Cover 1 oz of amorphous (red) phosphorus with 30 oz of hot water.
Àwọn irinṣẹ́ tí a nílò:
Fọ́sífọ́rọ̀sì pupa
Omi
Ago Gílásì2
2
Stir in the iodine
Stir in the iodine
Add finely powdered iodine little by little, stirring all the time, as long as it dissolves without colour. About 13½ oz dissolves.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Iodine13.5 ozÀwọn irinṣẹ́ tí a nílò:
Odó àti Ọmọ Odó Òkúta3
3
Neutralise with milk of lime
Neutralise with milk of lime
Pour the colourless liquid off the small deposit. Make it slightly alkaline with milk of lime; about 8 oz of lime is needed.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ẹ̀fun tí a kò tíì pa8 ozÀwọn irinṣẹ́ tí a nílò:
OmiAgo Gílásì4
4
Strain and wash
Strain and wash
Strain the solution and wash the residue of calcium phosphate, phosphite and hydroxide. The solution holds the calcium iodide. Ours: strain through muslin.
Àwọn irinṣẹ́ tí a nílò:
Aṣọ muslinOmi5
5
Evaporate, then fuse dry
Evaporate, then fuse dry
Evaporate to get the hydrate in deliquescent needles. For the dry salt, evaporate and fuse the residue in a closed vessel; in air it gives off iodine and turns to lime.
Àwọn irinṣẹ́ tí a nílò:
Àwo Ìgbẹ
Ìkòkò ìyọ́ pẹ̀lú ìdérí (porcelain)Ìtọ́nisọ́nà yìí ń ṣe
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