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Epsom Salt: Magnesian Limestone Digested in Dilute Sulphuric Acid, Ure 1839
Chemicalinterest at en.wikipedia (Wikimedia Commons) · Public domain
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Epsom Salt: Magnesian Limestone Digested in Dilute Sulphuric Acid, Ure 1839

Epsom salt, sulphate of magnesia, was first got from the springs at Epsom in 1695. Andrew Ure (1839): the simple way is to digest magnesian limestone in dilute sulphuric acid; the lime falls out as sulphate of lime and the clear liquid is boiled down to crystals. Gloves and goggles for the acid. The picture: Epsom salt crystals.
Oqalayo
Three days

Imiyalelo

1

Grind

Break and grind the magnesian limestone to a coarse powder and weigh it.

Izinto zokwakha zalesi sinyathelo:

I-dolomite (itshe lomcako elinemagnesia)I-dolomite (itshe lomcako elinemagnesia)1 kg

Amathuluzi adingekayo:

Isigqulo NomgquloIsigqulo Nomgqulo
Isisefo Senetha EcolekileIsisefo Senetha Ecolekile
Isikali sesilinganisoIsikali sesilinganiso
Imaski YothuliImaski Yothuli
2

Digest in acid

In a wooden tub, stir the powder into dilute sulphuric acid a little at a time. Add acid until fresh acid no longer fizzes on the stone (ours), and leave it to stand.

Izinto zokwakha zalesi sinyathelo:

I-asidi ye-sulfuric ehlanjululweI-asidi ye-sulfuric ehlanjululwe4 amalitha

Amathuluzi adingekayo:

Ubhavu wokhuniUbhavu wokhuni
Induku Yengilazi YokugovuzaInduku Yengilazi Yokugovuza
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
3

Settle and pour off

Let the white sulphate of lime settle to the bottom, then pour the clear liquid off it.

Amathuluzi adingekayo:

Ubhavu wokhuniUbhavu wokhuni
Ibhodwe ElikhuluIbhodwe Elikhulu
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
4

Crystallise

Boil the clear liquid down (step 5) and leave it to cool: the salt forms in four-sided prisms. Drain, dry and keep it in a closed jar.

Amathuluzi adingekayo:

Ibhodwe ElikhuluIbhodwe Elikhulu
IzinkuniIzinkuni
Ipuleti LokuhwamukaIpuleti Lokuhwamuka
Ijeke LengilaziIjeke Lengilazi
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
5

Water for crystallising

Ilayisha incwadi ye-Jupyter…

Izinto

2

Amathuluzi Adingekayo

12

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I-sulfate ye-magnesium (usawoti we-Epsom)

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Oil of Vitriol Distilled from Green Vitriol, the Nordhausen Way, Ure 1839
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Oil of Vitriol Distilled from Green Vitriol, the Nordhausen Way, Ure 1839

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Amakhemikhali

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Dilute Sulfuric Acid: Concentrated Acid Poured into Water
Yingozi

Dilute Sulfuric Acid: Concentrated Acid Poured into Water

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