Discuss the difference of the following sample preparation: (a) Liquid-liquid extraction (LLE) (b) Soxhlet extraction (c)...

Discuss the difference of the following sample preparation: (a) Liquid-liquid extraction (LLE) (b) Soxhlet extraction (c) Solid phase extraction (SPE) in terms of application, cost, extraction time, solvent usage.

Expert Solution

queen_honey_blossom answered 2 years ago

Define the following concepts and provide an exaple for each: solid-liquid extraction, liquiid-liquid extraction, partition coefficient,...

Define the following concepts and provide an exaple for each: solid-liquid extraction, liquiid-liquid extraction, partition coefficient, miscible solvents, immiscible solvents.

Define the following terms a) Solvent extraction b) Hydrated salt c) Saturated Solution

The question contain terms which require stating their meaning. In this case, for each question, their meaning should be stated.

Discuss, briefly, why you used a solid liquid extraction prior to running a TLC analysis on...

Discuss, briefly, why you used a solid liquid extraction prior to running a TLC analysis on your unknown compound and why ethanol was the chosen solvent. Also explain what the mobile phase for TLC was and why it was chosen. If something did not go as planned, this should also be explained.

4. A pharmaceutical company plans to use a liquid-liquid extraction to purify a drug that is...

4. A pharmaceutical company plans to use a liquid-liquid extraction to purify a drug that is a weak monoprotic base. The chemical has a pKb = 9.52 at 25oC. The KD for the neutral form of this chemical is 210 when using water and chloroform at 25oC. a. What fraction of this drug will be extracted from a 15.0 mL aqueous sample into 10.0 mL of chloroform at pH = 9.00 and 25oC? b. What fraction of this drug will...

At a pH of 4, the Cu-neocuproine complex formed in the liquid-liquid extraction experiment has a...

At a pH of 4, the Cu-neocuproine complex formed in the liquid-liquid extraction experiment has a partition coefficient of about 6.3 when equilibrated between the acid aqueous solution and chloroform. Calculate the concentration of Cu in the chloroform phase if 40.0 mL of a 0.26 M aqueous Cu solution buffered to pH 4 is equilibrated with 16.0 mL of chloroform.

need to know a, b and, c A. discuss the difference between the central nervous system...

need to know a, b and, c A. discuss the difference between the central nervous system and the peripheral nervous sustem. B. discuss the components of the somatic nervous system and those of the automatic nervous system. outline what they do!

Liquid A has a normal boiling point of 64 deg C and liquid B has a...

Liquid A has a normal boiling point of 64 deg C and liquid B has a normal boiling point of 98 deg C. a) which has the greater vapor pressure? b) which has the weaker intermolecular attractive forces in the liquid state?

In lab we did a liquid-liquid extraction using a separatory funnel - but i don't really...

In lab we did a liquid-liquid extraction using a separatory funnel - but i don't really understand what was happening ( i just followed directions given) - now my lab report asks me to describe 1. the concept of liquid liquid extraction and how it works 2. Describe how adjusting the pH of the aqueous phase as a means of altering solublity properties of compounds is used in extractions?? can anyone help me understand these two questions above.

From the discussion above, which layer (aqueous or organic) of a liquid-liquid extraction should contain the...

From the discussion above, which layer (aqueous or organic) of a liquid-liquid extraction should contain the ammonium salt of an organic compound, and why? Describe the procedure you would use in the laboratory to determine which layer is organic and which layer is aqueous. (Assume you do not have access to physical constants for the solvents being used.) What is the purpose of adding anhydrous sodium sulfate into an organic layer that results from a liquid-liquid extraction? If a mixture...

what are the similarities and differences between distillation, azeotropic distillation, extractive distillation and liquid-liquid extraction.

Question