Questions from General Chemistry

Q: What are the major differences between gas-liquid and liquid-

What are the major differences between gas-liquid and liquid-liquid chromatography?

Q: Describe a method for determining the number of plates in a column

Describe a method for determining the number of plates in a column.

Q: Describe two general methods for improving the resolution of two substances on

Describe two general methods for improving the resolution of two substances on a chromatographic column.

Q: The distribution constant for X between n-hexane and water is

The distribution constant for X between n-hexane and water is 8.9. Calculate the concentration of X remaining in the aqueous phase after 50.0 mL of 0.200 M X is treated by extraction with the followin...

Q: The distribution coefficient for Z between n-hexane and water is

The distribution coefficient for Z between n-hexane and water is 5.85. Calculate the percent of Z remaining in 25.0 mL of water that was originally 0.0550 M in Z after extraction with the following vo...

Q: What volume of n-hexane is required to decrease the concentration

What volume of n-hexane is required to decrease the concentration of X in Problem 29-11 to 1.00 x 10-4 M if 25.0 mL of 0.0500 M X is extracted with a) 25.0-mL portions? b) 10.0-mL portions? c) 2.0-...

Q: What are the y-axis and the x-axis of

What are the y-axis and the x-axis of an ordinary mass spectrum?

Q: What volume of n-hexane is required to decrease the concentration

What volume of n-hexane is required to decrease the concentration of Z in Problem 29-12 to 2.00 x 10-5 M if 40.0 mL of 0.0200 M Z is extracted with a) 50.0-mL portions of n-hexane? b) 25.0-mL portio...

Q: What is the minimum distribution coefficient that permits removal of 99%

What is the minimum distribution coefficient that permits removal of 99% of a solute from 50.0 mL of water with a) Two 25.0-mL extractions with toluene? b) Five 10.0-mL extractions with toluene?

Q: If 30.0 mL of water that is 0.0500

If 30.0 mL of water that is 0.0500 M in Q is to be extracted with four 10.0-mL portions of an immiscible organic solvent, what is the minimum distribution coefficient that allows transfer of all but t...