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Bismuth Oxide: Subnitrate Boiled with Sodium Hydroxide Solution (British Pharmacopoeia, 1907)
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Charlie

28. uMfumfu 2026DE
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Bismuth Oxide: Subnitrate Boiled with Sodium Hydroxide Solution (British Pharmacopoeia, 1907)

Boil bismuth subnitrate with sodium hydroxide solution: bismuth hydroxide falls and sodium nitrate stays dissolved. At 100 °C the hydroxide loses its water, leaving bismuth oxide, a dull lemon-yellow powder. Source: The Dispensatory of the United States of America (1907), Bismuthi Oxidum, after the British Pharmacopoeia. Not given: amounts, strength or time; those are stated as not given. The 10 % lye, washing and filter are ours. Picture drawn by Youblob.
Ophakathi
half a day

Imiyalelo

1

Boil the subnitrate with soda lye

Boil bismuth subnitrate with sodium hydroxide solution (ours: 10 %). Bismuth hydroxide is precipitated; sodium nitrate stays in solution. Not given: amounts and time. Goggles and gloves.

Izinto zokwakha zalesi sinyathelo:

I-bismuth subnitrateI-bismuth subnitrate1 as required

Amathuluzi adingekayo:

I-sodium hydroxide, isixazululo se-10 %I-sodium hydroxide, isixazululo se-10 %
Ibhikha Le-borosilicateIbhikha Le-borosilicate
Ipuleti ElishisayoIpuleti Elishisayo
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu E-nitrileAmagilavu E-nitrile
2

Wash and dry to the oxide

Filter off the precipitate and wash it (ours: with distilled water). Hold it at 100 °C: the hydroxide gives up its water and dull lemon-yellow bismuth oxide remains.

Amathuluzi adingekayo:

Iphepha LokuhluzaIphepha Lokuhluza
Amanzi AcwengisisiweAmanzi Acwengisisiwe
Ihhavini yokomisaIhhavini yokomisa

Izinto

1

Amathuluzi Adingekayo

8

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