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Sodium Citrate: Citric Acid Neutralised with Soda
Sodium citrate is citric acid with its acid taken up by soda. US Dispensatory (1907): to a hot solution of 59 parts of citric acid add a solution of 53 parts of monohydrated sodium carbonate, neutralise, evaporate and crystallise. With dry soda ash that is 45 parts.
The picture: sodium citrate crystals (Wikimedia Commons).
Beginner
1 day
Instructions
1
1
Two solutions
Two solutions
Dissolve 59 g of citric acid in hot water. Dissolve 45 g of soda ash in water.
Materials for this step:
Citric Acid59 g
Sodium Carbonate (soda ash)45 gTools needed:
Water
Borosilicate Beaker
Glass Stirring Rod
Balance Scale2
2
Neutralise
Neutralise
Add the soda solution to the hot acid, stirring, and adjust until it is neutral to litmus.
Tools needed:
Borosilicate BeakerGlass Stirring Rod
Litmus Paper3
3
Evaporate and crystallise
Evaporate and crystallise
Evaporate on the sand bath and let it crystallise. Keep the crystals in a closed jar.
Tools needed:
Evaporating Dish
Sand Bath
Glass Jars with LidsMaterials
2- 59 gPlaceholder
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Tools Required
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