You would normally use an excess of the solvent (toluene) to perform the extraction if you were using a separating funnel. To be certain you would need to do quick calculation of the density of the expected mixture.
Just a minor point but the density of ethylene bromohydrin looks a little high at 2.41. I seem to remember dibromoethane being just over 2.0 so I would have expected this to be lower.
I would identify the aqueous layer with anhydrous copper sulfate (turns white to blue) or from the curvature of the interface between the layers.
If toluene (density 0.87) wre used to extract ethylene bromohydrin (density 2.41) from an aqueous solution,
a. Could you be certain that the organic solution would form the upper layer?
b. by what test could you identify the nonaqueous layer.
1 answer
1 answer