can someone please help me with the right answer for the following questions. ca

Question

can someone please help me with the right answer for the following questions. can you please answer all of them or dont attempt to answer. thank you.

14. Which ONE of the following statements is CORRECT in relation to the distribution ratio in Liquid Liquid Extraction A. Distribution Ratio *Conc. of solute in organic phase Conc. of solute in aqueous phase B. Distribution Ratio Conc. of solute in aqueous phase Conc. of solute in organic phase C. Distribution Ratio a Conca of Silica Conc. of Methanol D. Distribution Ratio Mobile phase Stationary phase (1 mark) 15. Fatty acids in biological fluids will undergo chemical derivatisation using a catalyst, in an esterification reaction to form which ONE of the following compounds? A. Aldols B. Carboxylic acids C. Fatty acid methyl esters D. Ketels (1 mark) 16. A Diode Array detector (DAD in HPLC analysis is beneficial for which ONE of the following reasons? A. It allows for a single wavelength to be selected for detection B. It allows a wide range of wavelengths to be detected. C. The detector can be used with gradient elution and isocratic elution systems D. It allows high concentrations of analytes to be detected. (1 mark) 17. Which ONE of the following statements describes how separation of polar and non-polar analytes occurs within normal phase chromatography in HPLC. A. Polar analytes have an affinity for the non-polar stationary phase, this slows down the separation as they spend more time in the column and elute out first B. Non-Pola analytes have an affinity for the polar mobile phase, therefore they move the fastest and are eluted first. C. Non-polar analytes have an affinity for the non-polar mobile phase therefore they move the fastest and elute out first. D. Polar analytes have an affinity for the polar stationary phase, therefore they move the slowest and are eluted first.

Explanation / Answer

14 is 2nd option

15 carboxylic acids

16 it allows a wavelength to be selected

17 its 3rd option

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