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Copper Carbonate: Blue Vitriol Precipitated with Washing Soda
Metabisulfite (Wikimedia Commons) · CC BY-SA 4.0
Charlie

Yenziwe ngu-

Charlie

14. uMfumfu 2026DE
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Copper Carbonate: Blue Vitriol Precipitated with Washing Soda

Pour washing soda into a solution of copper sulfate and a pale blue sludge falls out; warm it and it turns into a dense green powder. George Fownes (1856) gives this as the way the pigment is made; it is close in make-up to the mineral malachite. Potters and glassmakers use it as a copper colour. The picture: a heap of basic copper carbonate powder.
Oqalayo
A day with drying

Imiyalelo

1

Two solutions

Dissolve the copper sulfate in one beaker of warm water and the washing soda in another.

Izinto zokwakha zalesi sinyathelo:

I-copper sulfate pentahydrate (CuSO4·5H2O)I-copper sulfate pentahydrate (CuSO4·5H2O)250 g
Isoda yokuwashaIsoda yokuwasha290 g
AmanziAmanzi2 amalitha

Amathuluzi adingekayo:

Isikali sesilinganisoIsikali sesilinganiso
Ibhikha LengilaziIbhikha Lengilazi
Ipuleti ElishisayoIpuleti Elishisayo
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
2

Pour in the soda

Pour the soda slowly into the copper, stirring; it froths as gas comes off. A pale blue sludge falls out. Stop when more soda no longer makes any.

Amathuluzi adingekayo:

Ibhikha LengilaziIbhikha Lengilazi
Induku Yengilazi YokugovuzaInduku Yengilazi Yokugovuza
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
3

Warm it green

Warm the mixture gently and stir. Fownes: the precipitate becomes dense and turns green.

Amathuluzi adingekayo:

Ibhikha LengilaziIbhikha Lengilazi
Ipuleti ElishisayoIpuleti Elishisayo
Induku Yengilazi YokugovuzaInduku Yengilazi Yokugovuza
4

Wash and dry

Filter it, wash it several times with clean water to take out the sodium sulfate, and dry it in a dish at low heat. Store the powder in a closed jar.

Izinto zokwakha zalesi sinyathelo:

AmanziAmanzi2 amalitha

Amathuluzi adingekayo:

Iphepha LokuhluzaIphepha Lokuhluza
Ifanela Lengilazi ElinomlomoIfanela Lengilazi Elinomlomo
Ipuleti LokuhwamukaIpuleti Lokuhwamuka
Ijeke LengilaziIjeke Lengilazi
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
5

Soda for the copper

Ilayisha incwadi ye-Jupyter…
6

Limits

The precipitation and the change to green are Fownes's; the quantities are ours. Copper salts are harmful if swallowed; do not breathe the dry powder.

Izinto

3

Amathuluzi Adingekayo

10

Le blueprint yenza

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Isibambeli

I-copper carbonate

Free

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Copper Sulfate from Copper Oxide and Dilute Sulfuric Acid

Copper Sulfate from Copper Oxide and Dilute Sulfuric Acid

ngu-CharlieDE

Amakhemikhali

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Washing Soda: Soda Ash Crystallised from Hot Water

Washing Soda: Soda Ash Crystallised from Hot Water

ngu-CharlieDE

Inorganic

20
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