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Subcarbonate of Iron: Iron Sulfate and Soda Crystals, USP 1860
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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.
Mwanzo
2 days

Maagizo

1

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.

Vifaa kwa hatua hii:

Salfati ya chumaSalfati ya chuma249 g
Soda ya kufuliaSoda ya kufulia280 g
MajiMaji3.8 lita

Zana zinazohitajika:

Mizani ya mizani-mbiliMizani ya mizani-mbili
Chombo cha kiooChombo cha kioo
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
2

Mix and let it settle

Pour the two solutions together, stir, and set it aside until the precipitate has settled.

Zana zinazohitajika:

Chombo cha kiooChombo cha kioo
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
3

Wash

Pour off the clear liquid. Wash the precipitate with water, settling and pouring off each time, until the washings pass nearly tasteless.

Vifaa kwa hatua hii:

MajiMaji1 as required

Zana zinazohitajika:

Chombo cha kiooChombo cha kioo
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
4

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.

Zana zinazohitajika:

Karatasi nyeupe ya kufyonzaKaratasi nyeupe ya kufyonza

Vifaa

3
  • 1
    Salfati ya chuma
    249 g
    Kishikilia Nafasi
  • 1
    Soda ya kufulia
    280 g
    Kishikilia Nafasi
  • 13
    Maji
    1 as required
    Kishikilia Nafasi

Zana Zinazohitajika

4

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Washing Soda: Soda Ash Crystallised from Hot Water

Washing Soda: Soda Ash Crystallised from Hot Water

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