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Washing Soda: Soda Ash Crystallised from Hot Water
Lazar.zenit (Wikimedia Commons) · CC BY 4.0
Charlie

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Charlie

14. Oktoba 2026DE
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Washing Soda: Soda Ash Crystallised from Hot Water

Washing soda is sodium carbonate crystallised with ten parts of water. George Fownes's chemistry manual (1856) makes it from soda ash: dissolve it in hot water, filter, and let it cool slowly; large clear crystals form. They turn to white powder in dry air, so keep them closed. The picture: sodium carbonate crystals grown on a slide, seen through crossed polarisers.
Mwanzo
A day with cooling

Maagizo

1

Dissolve the soda ash

Stir soda ash into hot water until no more dissolves. Fownes: the crystals dissolve in less than their own weight of boiling water.

Vifaa kwa hatua hii:

Kabonati ya Sodiamu (Majivu ya Soda)Kabonati ya Sodiamu (Majivu ya Soda)500 g
MajiMaji1 lita

Zana zinazohitajika:

Mizani ya mizani-mbiliMizani ya mizani-mbili
Bikari ya kiooBikari ya kioo
Sahani ya Kupasha JotoSahani ya Kupasha Joto
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
2

Filter it hot

Filter the hot solution to take out the insoluble dirt of the soda ash.

Zana zinazohitajika:

Karatasi ya KuchujaKaratasi ya Kuchuja
Faneli ya Kioo Yenye BombaFaneli ya Kioo Yenye Bomba
Bikari ya kiooBikari ya kioo
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
3

Cool slowly

Pour it into a wide dish, cover it loosely and leave it to cool slowly. Large clear crystals grow.

Zana zinazohitajika:

Sahani ya KuvukiziaSahani ya Kuvukizia
4

Drain and store closed

Pour off the liquor and drain the crystals. Store them in a closed jar: in dry air they lose water and crumble to white powder.

Zana zinazohitajika:

Chupa ya KiooChupa ya Kioo
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
5

Soda ash to crystals

Inapakia daftari la Jupyter…
6

Limits

The method is Fownes's; the quantities are ours. Washing soda is alkaline and irritates eyes and skin.

Vifaa

2

Zana Zinazohitajika

9

Mchoro huu unatengeneza

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Kishikilia nafasi

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Making Soda Ash by the Leblanc Process — The Chemical That Made Soap and Glass Affordable

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