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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
1
Boil the subnitrate with soda lye
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 subnitrate1 as requiredAmathuluzi adingekayo:
I-sodium hydroxide, isixazululo se-10 %
Ibhikha Le-borosilicate
Ipuleti Elishisayo
Izibuko Zokuchitheka Kwamakhemikhali
Amagilavu E-nitrile2
2
Wash and dry to the oxide
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 Lokuhluza
Amanzi Acwengisisiwe
Ihhavini yokomisaIzinto
1- 1 as requiredIsibambeli
Amathuluzi Adingekayo
8- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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