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Sodium Bicarbonate from Soda Ash and Carbon Dioxide
Sodium bicarbonate, sold as baking soda, is made from sodium carbonate (soda ash): Na₂CO₃ + CO₂ + H₂O → 2 NaHCO₃. Soda ash is dissolved in water and treated with carbon dioxide, and sodium bicarbonate comes out of the solution as a solid. In 1846 John Dwight and Austin Church opened the first factory in the United States to make baking soda this way. Dry the product gently: from 80–100 °C sodium bicarbonate slowly breaks down again into sodium carbonate, water and carbon dioxide.
Kati
Factory process
Maagizo
1
1
Dissolve the soda ash
Dissolve the soda ash
Dissolve sodium carbonate in water.
Vifaa kwa hatua hii:
Kabonati ya Sodiamu (Majivu ya Soda)1 as required
Maji1 as requiredZana zinazohitajika:
Tangi la mashapo2
2
Treat with carbon dioxide
Treat with carbon dioxide
Pass carbon dioxide into the solution. Na₂CO₃ + CO₂ + H₂O → 2 NaHCO₃. Sodium bicarbonate precipitates as a solid.
Vifaa kwa hatua hii:
Gesi ya kaboni dioksidi1 as required3
3
Filter and dry
Filter and dry
Filter off the solid and dry it below 80 °C, where it starts to decompose back into sodium carbonate.
Zana zinazohitajika:
Kichujio cha kubana
Kikaushi cha joto la chiniVifaa
3- 1 as requiredKishikilia Nafasi
- 1 as requiredKishikilia Nafasi
- 1 as requiredKishikilia Nafasi
Zana Zinazohitajika
3- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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