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Zinc Oxide (Pharmacy): Zinc Carbonate Precipitated with Hot Soda, Then Heated
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Charlie

21. Ukwakira 2026DE
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Zinc Oxide (Pharmacy): Zinc Carbonate Precipitated with Hot Soda, Then Heated

The zinc oxide of pharmacy, by the wet route Thorpe's Dictionary (1913) gives: very pure zinc sulphate is precipitated with a hot solution of sodium carbonate, and the dried zinc carbonate is heated to drive off the carbon dioxide. Pure zinc oxide dissolves completely in ammonia. The picture: our diagram.
Utangiye
1 day

Amabwiriza

1

Precipitate with hot sodium carbonate

Precipitate a solution of very pure zinc sulphate with a hot solution of sodium carbonate. No amounts are given. Ours: dissolve each in water and stir the hot carbonate solution in.

Ibikoresho by'iyi ntambwe:

Sulfate ya zincSulfate ya zinc1 as required

Ibikoresho bikenewe:

Karubonate ya Sodiyumu (ivu rya soda)Karubonate ya Sodiyumu (ivu rya soda)
Amazi YatunganyijweAmazi Yatunganyijwe
Igikombe cy'IkirahureIgikombe cy'Ikirahure
Igikoresho cyo kuvangaIgikoresho cyo kuvanga
Urubaho rushyushyaUrubaho rushyushya
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

Filter, wash and dry (ours)

Ours: filter off the carbonate, wash it with water and dry it.

Ibikoresho bikenewe:

Urupapuro rwo KuyungururaUrupapuro rwo Kuyungurura
Akayunguruzo k'Ikirahure Gafite UmugoziAkayunguruzo k'Ikirahure Gafite Umugozi
Icupa ryo gukarabaIcupa ryo gukaraba
Ifuru yo kumishahoIfuru yo kumishaho
3

Heat to expel carbon dioxide

Heat the dried carbonate to drive off the carbon dioxide, leaving zinc oxide. No temperature is given. Ours: a crucible in a muffle furnace.

Ibikoresho bikenewe:

Ikirundo cyo gushongeramo gifite igifuniko (porukorene)Ikirundo cyo gushongeramo gifite igifuniko (porukorene)
Ifuru ya muffleIfuru ya muffle
Amakoro y'Icyombo GishongeshaAmakoro y'Icyombo Gishongesha
Uturindantoki twihanganira ubushyuheUturindantoki twihanganira ubushyuhe

Ibikoresho

1

Ibikoresho bikenewe

14

Iki gishushanyo gikora

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Agateganyo

Ifu ya oxide ya zinki

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