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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.
Oqalayo
2 days
Imiyalelo
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.
Izinto zokwakha zalesi sinyathelo:
I-ferrous sulfate249 g
Isoda yokuwasha280 g
Amanzi3.8 amalithaAmathuluzi adingekayo:
Isikali sesilinganiso
Isitsha sengilazi
Induku Yengilazi Yokugovuza2
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.
Amathuluzi adingekayo:
Isitsha sengilaziInduku Yengilazi Yokugovuza3
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.
Izinto zokwakha zalesi sinyathelo:
Amanzi1 as requiredAmathuluzi adingekayo:
Isitsha sengilaziInduku Yengilazi Yokugovuza4
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.
Amathuluzi adingekayo:
Iphepha elimunca uyinkiIzinto
3- 249 gIsibambeli
- 280 gIsibambeli
- 1 as requiredIsibambeli
Amathuluzi Adingekayo
4- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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