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Subcarbonate of Iron: Iron Sulfate and Soda Crystals, USP 1860
Mix a solution of iron sulfate with one of washing soda and a reddish-brown powder settles out: the "precipitated carbonate of iron" of the 1860 US Pharmacopoeia. Washed and dried without heat, it is the starting point for reduced iron.
Source: United States Pharmacopoeia, 4th decennial revision (1860, publ. 1863), Ferri Subcarbonas. The metric figures are our conversions. Picture drawn by Youblob.
Utangiye
2 days
Amabwiriza
1
1
Dissolve the two salts
Dissolve the two salts
Dissolve 8 troy ounces (249 g) of iron sulfate in 4 pints (1.9 L) of water. Separately, dissolve 9 troy ounces (280 g) of carbonate of soda crystals in another 4 pints.
Ibikoresho by'iyi ntambwe:
Salfate y'icyuma249 g
Sode yo kumesa280 g
Amazi3.8 litiroIbikoresho bikenewe:
Umunzani w'ibiro
Ikibindi cy'ikirahure
Akati k'Ikirahure ko Kuvanga2
2
Mix and let it settle
Mix and let it settle
Pour the two solutions together, stir, and set it aside until the precipitate has settled.
Ibikoresho bikenewe:
Ikibindi cy'ikirahureAkati k'Ikirahure ko Kuvanga3
3
Wash
Wash
Pour off the clear liquid. Wash the precipitate with water, settling and pouring off each time, until the washings pass nearly tasteless.
Ibikoresho by'iyi ntambwe:
Amazi1 as requiredIbikoresho bikenewe:
Ikibindi cy'ikirahureAkati k'Ikirahure ko Kuvanga4
4
Dry without heat
Dry without heat
Dry it on blotting paper without heat. The result is a reddish-brown powder that dissolves in dilute hydrochloric acid with slight effervescence.
Ibikoresho bikenewe:
Urupapuro rwumutsa winoIbikoresho bikenewe
4- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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