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Vera_Pavlovna [14]
3 years ago
12

During a solvent extraction, a student lost track of which layer was the aqueous layer and which layer was the organic layer. Wh

at simple, non-destructive test could be used to determine which layer is which?
a. add a little distilled water to see which layer the water adds to

b. obtain a sample of the solution in the seperatory funnel and ultilize IR

c. ask the instructor if you can perform a supercritical extraction of the sample

c. obtain a sample of solution in seperatory funnel and utilize infrared spectroscopy (IR).
Chemistry
2 answers:
KatRina [158]3 years ago
4 0

Answer:

a. add a little distilled water to see which layer the water adds to

Explanation:

The problem tells us to keep in mind two major aspects of the test: It has to be <em>simple</em>, as well as <em>non-destructive</em>:

  • Adding distilled water can be made in under a minute, without requiring specialized laboratory equipment, unlike IR.
  • It is also non-destructive, because the contents on either layer won't change due to the added distilled water.
victus00 [196]3 years ago
4 0
A. add a little-distilled water to see which layer the water adds to

depending density of organic solvent-water layer can be top or bottom when we add little water you can absorb water addition or repulsion which helps to identify water layer
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GalinKa [24]

Molarity is expressed as the number of moles of solute per volume of the solution. The mass of oxalic acid dihydrate needed for the solution is calculated as follows:

Amount in moles: (0.357 mol H2C2O4•2H2O / L) (.250 L ) = 0.0893 mol H2C2O4•2H2O


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