Purifying an organic liquid

Why is sodium hydrogencarbonate used to wash the product? What must be done when this is used?

Neutralises any remaining reactant acid. Must be shaken and pressure released from CO2 produced.

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Why is saturated sodium chloride solution used to wash the product?

Helps to separate the organic layer from the aqueous layer.

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Which density does the upper layer of separated liquid have and is this usually organic or aqueous?

Lower density, usually organic.

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Why is a drying agent used after separating the organic and aqueous layers?

To remove water from the organic product - so that the product is pure and its final mass is not affected by the mass of water.

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Which two features should the drying agent have?

1) Be insoluble in the organic liquid. 2) Not react with the organic liquid.

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Give 3 examples of drying agents

1) Anhydrous calcium chloride 2) Anhydrous sodium sulfate (VI) 3) Anhydrous magnesium sulfate

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Other cards in this set

Why is saturated sodium chloride solution used to wash the product?

Helps to separate the organic layer from the aqueous layer.

Which density does the upper layer of separated liquid have and is this usually organic or aqueous?

Why is a drying agent used after separating the organic and aqueous layers?

Which two features should the drying agent have?

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