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Sodium Pyrophosphate: Disodium Phosphate Heated to 300 °C
Charlie

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Charlie

20. Ukwakira 2026DE
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Sodium Pyrophosphate: Disodium Phosphate Heated to 300 °C

Sodium pyrophosphate is a white salt that dissolves to an alkaline solution. Thorpe's Dictionary (1913) makes it in two easy stages: neutralise phosphoric acid with soda until alkaline and crystallise disodium phosphate, then heat the dried salt to 300 °C, when it gives off water and turns into the pyrophosphate. The picture: our diagram.
Utangiye
1 day

Amabwiriza

1

Phosphoric acid and soda

Add sodium carbonate to phosphoric acid diluted with water until the solution is alkaline. Filter.

Ibikoresho by'iyi ntambwe:

Aside fosiforike (85 %)Aside fosiforike (85 %)1 igice
Karubonate ya Sodiyumu (ivu rya soda)Karubonate ya Sodiyumu (ivu rya soda)1 igice

Ibikoresho bikenewe:

Amazi YatunganyijweAmazi Yatunganyijwe
Urupapuro rwerekana pHUrupapuro rwerekana pH
Igikombe cy'Ikirahure Kirwanya UbushyuheIgikombe cy'Ikirahure Kirwanya Ubushyuhe
Akayunguruzo k'Ikirahure Gafite UmugoziAkayunguruzo k'Ikirahure Gafite Umugozi
Urupapuro rwo KuyungururaUrupapuro rwo Kuyungurura
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

Crystallise disodium phosphate

Concentrate and let it crystallise: large clear prisms of disodium phosphate. Dry them at about 45 °C until they lose their water.

Ibikoresho bikenewe:

Isahani yo kumishaIsahani yo kumisha
Urubaho rushyushyaUrubaho rushyushya
3

Heat to 300 °C

Heat the dry salt to 300 °C: it gives off water and turns completely into sodium pyrophosphate, a white glassy mass.

Ibikoresho bikenewe:

Icyombo cyo gushongeramoIcyombo cyo gushongeramo
Ifuru ya muffleIfuru ya muffle
Uturindantoki twihanganira ubushyuheUturindantoki twihanganira ubushyuhe

Ibikoresho

2

Ibikoresho bikenewe

12

Iki gishushanyo gikora

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Agateganyo

Pirofosifate ya sodiyumu

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Phosphoric Acid from Burned Phosphorus: the Thermal Process
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Phosphoric Acid from Burned Phosphorus: the Thermal Process

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