EM 362-Spring 17-HAAS Activities and Due Dates I Ch21 4/26/2017 11:00 PM 754/100
ID: 515658 • Letter: E
Question
EM 362-Spring 17-HAAS Activities and Due Dates I Ch21 4/26/2017 11:00 PM 754/100 4/20/2017 08:19 PM Gradeboo Print calculator Periodic Table Question 13 of 25 Sapling Learning Consider the data below for a liquid chromatography separation of four compounds, A, B, C, and Don a 30.0 cm column. Calculate the number of theoretical plates, N, for each peak. Width at the Time (min) Base (min) Numbe A 526 0422 B 123 108 C 145 What is the average number of theoretical plates, Nang for the column? What is the plate height, H, for the column? cm Previons & Give up 6vew Souton Check Answer 0 Next JExt aExplanation / Answer
N =16 tR^2 / w^2
ANSWER
NA
(16) (5.26*60s)^2/ (0.422 *60 s)^2
2485.80
NB
(16) (12.3*60s)^2/ (1.08 *60 s)^2
2075.30
NC
(16) (14.5*60s)^2/ (1.15 *60 s)^2
2543.66
ND
(16) (23.3*60s)^2/ (1.84 *60 s)^2
2565.64
N = 16 ( tr /W )^2
ANSWER
NA
(16) (5.26*60s)^2/ (0.422 *60 s)^2
2485.80
NB
(16) (12.3*60s)^2/ (1.08 *60 s)^2
2075.30
NC
(16) (14.5*60s)^2/ (1.15 *60 s)^2
2 543.66
ND
(16) (23.3*60s)^2/ (1.84 *60 s)^2
2 565.64
2485.80
2075.30
2 543.66
2 565.64
(2485.80 + 2075.30 + 2543.66 + 2565.64) /4=2417.6-ANSWER-------Navg
H = L/N = 30.0 cm /2565.64 = 8.7 x 10-3 cm=0.0116929889 centimeters
ANSWER
NA
(16) (5.26*60s)^2/ (0.422 *60 s)^2
2485.80
NB
(16) (12.3*60s)^2/ (1.08 *60 s)^2
2075.30
NC
(16) (14.5*60s)^2/ (1.15 *60 s)^2
2543.66
ND
(16) (23.3*60s)^2/ (1.84 *60 s)^2
2565.64
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