A student extracted a 150 ml. of tea solution containing 3.0 g of caffeine, (i) once with 80 mL of DCM and (ii) twice with 40mL of DCM. The first extraction yielded 0.0758g of caffeine after evaporation of DCM and the second extraction yielded 0.0968 g after evaporation of DCM. a) Define the distribution coefficient (written and mathematical expression) b) Calculate KD, and LKD₂. (..ε+

A student extracted a 150 ml. of tea solution containing 3.0 g of caffeine, (i) once with 80 mL of DCM and (ii) twice with 40mL of DCM. The first extraction yielded 0.0758g of caffeine after evaporation of DCM and the second extraction yielded 0.0968 g after evaporation of DCM. a) Define the distribution coefficient (written and mathematical expression) b) Calculate KD, and LKD₂. (..ε+

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

2) N2= Ni(acac)2 C Ph JCS P1, 1984, 261
(0.0050 x 28000.0) + (2819 × 15) Express your answer to the appropriate number of significant digits. να ΑΣφ ? (0.0050 x 28000.0) + (2819 × 15) = Submit Previous Answers Request Answer X Incorrect; Try Again; One attempt remaining Part D 861 x [1255 – (3.65 x 101)] Express your answer to the appropriate number of significant digits. ? 861 x [1255 – (3.65 x 101)] = Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining
Br CEN А В C `NH2 D E `NH2 B Се
de + NC CN
Solve the following problem: (1.327 x 103 cm)3 = O 2.34 x 10-9 cm3 O 2.337 x 109 cm3 2.3368 x 10-9 cm3 O 2.337 x 109 cm O 2.34 x 10° cm
Every year Every second (1 year 365 days).
Boxes 1-4 box 1 answer choices: 0, 3, 1, 2, or 4. box 2 answer choices: 2, 1, 3, 0, or 4. box 3 answer choices: 10.7, 0.241. 0.482, 0.804, 5.36, 0.121, 3.21, or 1.61. Box 4 answer choices: L^2/mol^2•s, L^3/mol^3•s, L/mol•s, 1/s, or L^4/mol^4•s
A2
Give the systematic name of the given compounds (number 2 only)
A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of dimethyl sulfoxide, ethanolamine, tetrahydrofuran, methyl acetate, and diethylamine. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from her collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density dimethyl sulfoxide 1.1 mL 1.0 mL ethanolamine tetrahydrofuran 0.89 mL methyl acetate 0.93 mL diethylamine 0.71 mL Next, the chemist measures the volume of the unknown liquid as 1655. cm and the mass of the unknown liquid as 1.55 kg. Calculate the density of the liquid. Round 0g / mL your answer to 3 significant digits. O yes Given the data above, is it possible to identify the liquid? O no O dimethyl sulfoxide O ethanolamine O tetrahydrofuran O methyl acetate O diethylamine If it is possible to identify the…
The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.
True or False T = PV/nR Group of answer choices True False