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Colloidal Silver: Carey Lea's Soluble Silver from Silver Nitrate
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Charlie

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Charlie

19. Oktoba 2026DE
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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.
Kati
2 days

Maagizo

1

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.

Vifaa kwa hatua hii:

Nitrati ya FedhaNitrati ya Fedha10 g
Salfati ya chumaSalfati ya chuma30 g
Sitrati ya sodiamuSitrati ya sodiamu36 g
Maji yaliyosafishwa kwa mvukeMaji yaliyosafishwa kwa mvuke340 ml

Zana zinazohitajika:

Mizani ya mizani-mbiliMizani ya mizani-mbili
Silinda ya kupimiaSilinda ya kupimia
Mitungi ya kioo yenye vifunikoMitungi ya kioo yenye vifuniko
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
Glavu za NaitriliGlavu za Naitrili
2

Pour and stir

Pour the iron-citrate mixture into the silver nitrate solution, stirring all the time. A dark precipitate forms.

Zana zinazohitajika:

Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
Mitungi ya kioo yenye vifunikoMitungi ya kioo yenye vifuniko
Glavu za NaitriliGlavu za Naitrili
3

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.

Zana zinazohitajika:

Pombe kamiliPombe kamili
Maji yaliyosafishwa kwa mvukeMaji yaliyosafishwa kwa mvuke
Mitungi ya kioo yenye vifunikoMitungi ya kioo yenye vifuniko
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
4

Dry

Dry the precipitate in a dish at room temperature. It becomes a bluish or greenish mass.

Zana zinazohitajika:

Sahani ya KuvukiziaSahani ya Kuvukizia
5

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.

Vifaa kwa hatua hii:

Maji yaliyosafishwa kwa mvukeMaji yaliyosafishwa kwa mvuke500 ml

Zana zinazohitajika:

Mizani ya mizani-mbiliMizani ya mizani-mbili
Chupa za kioo zenye viziboChupa za kioo zenye vizibo

Vifaa

4

Zana Zinazohitajika

9

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Absolute Alcohol: Spirit Dried over Potash and Quicklime (Drinkwater)

Absolute Alcohol: Spirit Dried over Potash and Quicklime (Drinkwater)

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