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UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
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UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Colloidal Silver: Carey Lea's Soluble Silver from Silver Nitrate
Carey Lea found in 1891 that silver nitrate reduced by ferrous sulphate in the presence of sodium citrate gives a silver that dissolves in water with a deep red colour. The 1907 US Dispensatory gives the recipe: the mixed iron and citrate solutions poured into 10 % silver nitrate, the precipitate washed by redissolving it in water and throwing it down again with absolute alcohol. Dried, it is a bluish-green mass of about 97 % silver. Salt solutions precipitate it, so use distilled water only.
The picture: our diagram.
Hagati
2 days
Amabwiriza
1
1
Make the three solutions
Make the three solutions
Dissolve 10 g of silver nitrate in distilled water to 100 ml (10 %). Separately dissolve 30 g of ferrous sulphate in 100 ml of water and 36 g of crystallised sodium citrate in 140 ml of water, then mix these two.
Ibikoresho by'iyi ntambwe:
Nitrate ya feza10 g
Salfate y'icyuma30 g
Sitirate ya sodiyumu36 g
Amazi Yatunganyijwe340 mlIbikoresho bikenewe:
Umunzani w'ibiro
Igikoresho gipima ibitemba
Icupa ry'Ikirahure Rifite Umufuniko
Akati k'Ikirahure ko Kuvanga
Uturindantoki twa Nitirile2
2
Pour and stir
Pour and stir
Pour the iron-citrate mixture into the silver nitrate solution, stirring all the time. A dark precipitate forms.
Ibikoresho bikenewe:
Akati k'Ikirahure ko KuvangaIcupa ry'Ikirahure Rifite UmufunikoUturindantoki twa Nitirile3
3
Settle and wash with alcohol
Settle and wash with alcohol
Let it settle and pour off the liquid. Dissolve the precipitate in a little distilled water and throw it down again with absolute alcohol. Pour off the alcohol.
Ibikoresho bikenewe:
Alukoro itunganyeAmazi YatunganyijweIcupa ry'Ikirahure Rifite UmufunikoAkati k'Ikirahure ko Kuvanga4
4
Dry
Dry
Dry the precipitate in a dish at room temperature. It becomes a bluish or greenish mass.
Ibikoresho bikenewe:
Isahani yo kumisha5
5
Make the 1 % solution
Make the 1 % solution
Dissolve the dried silver in distilled water at 1 g to 100 ml. It dissolves deep red. Keep it in a stoppered bottle and do not mix it with salt water.
Ibikoresho by'iyi ntambwe:
Amazi Yatunganyijwe500 mlIbikoresho bikenewe:
Umunzani w'ibiro
Amacupa y'ikirahuri afite ibipfundikizoIbikoresho
4- 10 gUmwanya
- 30 gUmwanya
- Umwanya
- 840 mlUmwanya
Ibikoresho bikenewe
9- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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