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cloveb cloveb
wrote...
Valued Member
Posts: 770
A month ago
Suppose that you have a reaction mixture which consists of 14.2 g of CsCl and 12.0 g of an interesting organic compound dissolved in 100 mL of water.  You would like to have the pure organic compound, separate from water and salt, so you decide to carry out an extraction.  You add 100 mL of chloroform and vigourously shake in a separatory funnel.

a) After settling, both layers are clear colourless liquids.  How do you know which
layer is the organic layer?
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wrote...
Staff Member
A month ago
In order to determine which layer is the organic layer or aqueous is to drip a drop of water into the mixture in the separator funnel. If the water drop dissolve as it hit the upper layer of a mixture then the bottom layer is organic. Also, if the upper layer is organic and the bottom is aqueous then the drop will travel through the upper liquid then dissolve when it reaches the bottom layer. Otherwise, if the upper layer is organic then the water drop will not dissolve and will sink to the bottom layer.  However, you can determine if the solution is (organic or aqueous) is by looking at the density of the water and the organic compound that mixed in the solution. If the density of the organic compound is less so it will be in the upper layer and water is lower layer and vice versa because compound with less density will float.
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