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Calcium Iodide: Iodine Dissolved over Amorphous Phosphorus and Neutralised with Milk of Lime (Liebig, Thorpe 1912)
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1. Novemba 2026DE
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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.
Kati
1 day

Maagizo

1

Phosphorus under hot water

Cover 1 oz of amorphous (red) phosphorus with 30 oz of hot water.

Zana zinazohitajika:

Fosforasi nyekunduFosforasi nyekundu
MajiMaji
Bikari ya kiooBikari ya kioo
2

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.

Vifaa kwa hatua hii:

AyodiniAyodini13.5 oz

Zana zinazohitajika:

Kinu na mchi wa jiweKinu na mchi wa jiwe
3

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.

Vifaa kwa hatua hii:

Chokaa haiChokaa hai8 oz

Zana zinazohitajika:

MajiMaji
Bikari ya kiooBikari ya kioo
4

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.

Zana zinazohitajika:

Kitambaa cha musuliniKitambaa cha musulini
MajiMaji
5

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.

Zana zinazohitajika:

Sahani ya KuvukiziaSahani ya Kuvukizia
Kikaango cha kuyeyushia chenye mfuniko (kaure)Kikaango cha kuyeyushia chenye mfuniko (kaure)

Vifaa

2
  • 2
    Ayodini
    13.5 oz
    Kishikilia Nafasi
  • 3
    Chokaa hai
    8 oz
    Kishikilia Nafasi

Zana Zinazohitajika

7

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