Chapter 0: Q3P (page 1)
What does the designation 200/400mesh mean on a bottle of chromatography stationary phase? What is the size range of such particles? Which particles are smaller,100/200or 200-400mesh?
Short Answer
200/400 mesh are smaller.
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Chapter 0: Q3P (page 1)
What does the designation 200/400mesh mean on a bottle of chromatography stationary phase? What is the size range of such particles? Which particles are smaller,100/200or 200-400mesh?
200/400 mesh are smaller.
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The relative retention for two compounds in gas chromatography is 1.068 on a column with a plate height of 0.520mm.The retention factor for compound 1 is 5.16.
(a) Find the retention factor for compound 2.
(b) What length of column will separate the compounds with a resolution of 1.50 ?
(c) The retention time for air () is 2.00 min. If the number of plates is the same for both compounds, Findfor each peak.
(d) If the volume ratio of stationary phase to mobile phase is 0.30,Find the partition coefficient for compound 1.
Consider the following equilibria in aqueous solution:
(1)
(2)
(3)
(a) Calculate the numerical value of the equilibrium constant for the reaction.
(b) Calculate the concentration ofin equilibrium with excess undissolved solid AgCl.
(c) Find the numerical value offor the reaction
How many milliliters of 2.15% alcoholic dimethylglyoxime should be used to provide a 50.0% excess for Reaction 27-7 with 0.998 4 g of steel containing 2.07 wt% Ni? Assume that the density of the dimethylglyoxime solution is 0.790 g/mL.
Calculate the isoionic pH of 0.010M lysine.
25. Write a mass balance for a solution ofif the species
areandrole="math" localid="1663402048017" .
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