One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was brought to a lab for analysis. Two extractions each with 50 ml of fresh organic solvent were performed. On analysis of the aqueous phase after the first extraction, the concentration of PCB was 10 µg/ml. After the second extraction with fresh organic solvent, the concentration of PCB in the aqueous phase was 0.6 µg/ml.

One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was brought to a lab for analysis. Two extractions each with 50 ml of fresh organic solvent were performed. On analysis of the aqueous phase after the first extraction, the concentration of PCB was 10 µg/ml. After the second extraction with fresh organic solvent, the concentration of PCB in the aqueous phase was 0.6 µg/ml.

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

The chemical analysis of a water indicates the presence of cations in the following concentrations: Na+ 53 mg/L Mg2+36 mg/L K+ 72 mg/L Fe2+ 98 mg/L Mn2+15 mg/L A local softening company advertises that its softening unit has a capacity of 1000 meq. If water is used at the rate of 15 m³ per day, how frequently (i.e. how many times) will the unit have to be regenerated to provide the householder with soft water? (Na = 23, Mg = 24.4, K = 39, Fe = 55.85, Mn = 54.94 gms/mole) Answer: 105 Check
3. Derive the expression for the molar mass in terms of the mass, pressure, volume, and temperature of a gas (hint: use the ideal gas law and the definition of molar mass in Equation (2)).
b. 3.20 x 10-4 4.72 x 108
Figure -۹ يفة H A یا اور ان کے C D :0; :2
Which of the following alkenes is the most stable? O O The sauna premiu
1. 2 Li, Et,0 2. 0.5 equiv. Cul Br 3. CH3(CH2)2Br FEB 20 étv MacBook Air
plesase help m.e with this
g. Cl AICI3
Every year Every second (1 year 365 days).
A student sets up the following equation to convert a measurement.(The ?stands for a number the student is going to calculate.)Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together.
Need help with homework
:58 PM Thu Sep 21 : ; 1 { ? 11 1 LTE 56% 1 Submit delete