Chapter 11

Please upload your full solution to the following problem. For the experimental isotherm data given below, determine the Freundlich and Langmuir isotherm parameters. Apply linear regression to determine the isotherm parameters. A spreadsheet can be used for this purpose. Which of the two isotherms better describes the data? Experimental data: Carbon type: F-400 Carbon size: 200 × 400 . Chemical: Trichloroethene, C₂HCl3 (131.39 g/mol) Temperature: 13 C pH: 7.5-8 Equilibrium time: 31 days ● Ⓡ B B Sample number 123456 TCE Liquid-Phase Concentration CA. μmol/L 23.6 6.67 3.26 0.322 0.169 0.114 TCE Adsorbent-Phase Concentration 9A, μmol/g 737 450 318 121 85.2 75.8 2

Why is strict implementation of LQMS (Laboratory Quality Management System) or GLP is necessary ? What are the elements ?

Which one of the following statements is not correct about MSDS? A It provides single reference for all information about hazardous Chemicals. It is based on the recommendation of the United Nation's Committee of Experts on Globally Harmonized B System of Classification and Labelling of Chemical; It does not contain information on physical and chemical properties of the material, potential hazards of the material and how to work safely with these materials. Material Safety Data sheet forms the important elements of effective Chemical Hazards Communication D System.

The first-order degradation rate constant k was determined to be 0.0125/day for contaminant A and 0.0030/day for contaminant B in a soil. Calculate the half-life T1/2 and the 95% dissipation time for these contaminants in the soil. Compare the persistence between the two contaminants.

Briefly explain about  degradation of azo dyes in wastewater using micro-nano bubbles (MNBs) treatment. Explain how the process is done.

If some of the analytes were found to be out of range after doing the Quality Control and the machine repeatedly gives invalid result. What are the possible problem and best solution as a Medical Technologist?

Chemistry An aquifer contaminated with petroleum is found to have the following component concentrations at a particular site: benzene158 ppm toluene124 ppm ethylbenzene91 ppm xylene45 ppm n-heptadecane161 ppm pristane  84 ppm Provide an estimate for the age of the spill at this site using (a) BTEX ratio and (b) nC17:Pr ratio. Show your calculations and use units throughout. Give proper s.f. for the answer.

Please answer this organic chemistry problem asap

Please send me the question in 20 minutes it's very urgent plz

Describe an electrochemical sensor assay method for rapid bacterial detection and identification.What are the principles and mechanisms involved?

2 what is the purpose of BSC Level 1 & 2, proper layout, performance, and its application in biosafety assessment

TUTORIAL 5.pdf + PDF File | C:/Users/Afiqah/Documents/SK0024/TUTORIAL%205.pdf Q + CD Page view A Read aloud E Highlight 1 of 2 Draw Erase 1. Based on the poster below: THE CHEMISTRY OF INSECT REPELLENTS COMMON COMPOUNDS IN INSECT REPELLENTS HOW DO REPELLENTS WORK? UPLEASANT DOR DEET NN-DIETHYL-M-TOLUAMIDE ICARIDIN A.K.A PICARIDIN BND TO DLACRYECEPS PRODUCE REPELLENTEECT Recent studies sggest that, aer intaly to its repelent effect This could have future implicaions for how the efficacy of repelents is deteined Most comman active ingredien Odourless et damage platies 28hours proection 20o soktion 24 hours pronection (20% solution ( t but cn caute mild Efective ye mesuos, ticks, fieas biting feas& chiggers A BUILT IN DEFENCE? 1-METHYLPIPERAZINE Effective v mosquitos, ticks fieas WHAT ATTRACTS INSECTS? 1-0CTEN-3-OL CH CITRIODIOL P-MENTHANE-3,8-DIOL IR3535 ETHYL 3TACETYLBUTYLAMINOI PROPANOATE HN, This chemical is contained in human sweat and breath, and is thought to attract biting insects…

Real life applications of standardization of NaOH.

Figure 7 of Conrad et al. (1999) shows the variation in C-isotopic composition of CO2 as a function of the concentration of methane measured in the soil and aquifers of a site contaminated in the residues of aviation fuels. Explain briefly the aim of these particular measurements made to the environmental study. Also explain briefly why there is a difference in isotopic composition of CO2 obtained via aerobic degradation and methanogenic degradation of AVGAS (fuel residues as contaminants) and the linear "mixing relationship" noted in Figure 7. 35 30 methane oxidation methanogenic degradation of AVGAS 25 - 20 15 Sampling Locations 10 aerobie degradation of AVGAS A 12 • 13 5 6. 14 O 20 O 21 9 O 10 -30 -25 -20 -15 -10 -5 8®C (%c) of CO, Fig. 7. Plot of %CH4 vs the 8'³C values of CO2 by sample location for all samples containing CH4 from the study site. The dashed line is a best fit line through the data. Also shown are the approximate fields that would be expected for methanogenic and…

Figure 7 of Conrad et al. (1999) shows the variation in C-isotopic composition of CO2 as a function of the concentration of methane measured in the soil and aquifers of a site contaminated in the residues of aviation fuels. Explain briefly the aim of these particular measurements made to the environmental study. Also explain briefly why there is a difference in isotopic composition of CO2 obtained via aerobic degradation and methanogenic degradation of AVGAS (fuel residues as contaminants) and the linear “mixing relationship” noted in Figure 7.   How does the degradation process influence the CO2 isotopic signature ? I don't understand why the CO2 from aerobic degradation is lighter than the one from methnogenic degradation ?

Explain the difference between a. nucleation and particle growth b. occlusion and mixed-crystal formation c. precipitation and coprecipitation

Module Code & Title: CHM9011M Chromatography and Sep Sciences Section 1: Purpose Clarity of Purpose ): Clearly states the purpose of the SOP. Relevance to Task : Demonstrates the importance and relevance of the procedure. Alignment with Goals ): Shows how the procedure aligns with organisational goals.

OSHA's Hazard Communication Standard requires chemical manufacturers to evaluate hazards relating to their products and provide a Safety Data Sheet in accordance to the Globally Harmonized System (GHS) in which the use of pictograms (see Figure 1) is required to communicate hazard information. Predict (with reasons) two (2) hazards related to each of the two activities below, and assign two (2) relevant pictograms listed in Figure 1 to each of the two activities. Activity 1: Removing diethyl ether (last opened in 2019) using a rotary evaporator. Activity 2: Using carbon monoxide gas as a reducing agent to reduce iron chloride. Figure 1. Pictograms advised by the Globally Harmonized System for communication of chemical hazards.

1) The stabilities of anthocyanins (ACNS) in strawberry juice concentrate (SJC) and pomegranate juice concentrate (PJC) were studied at 20°C. ACNS were degraded in both concentrates at the same percentage throughout the storage at 20°C. The data are presented in Table 1. a) Find out the reaction rate constants with their units. In which juice concentrate, the stability of ACNS is higher? How did you reach this conclusion, explain in one sentence. Table 1- ACN contents of SJC and PJC stored at 20°C SJC PJC Time (days) ACN (mg/L) Time (days) ACN (mg/L) 2250 1080 60 700 125 540 130 180 210 425 225 16 295 230

6.

4.Discussed the Purposed of the Golden rules in the practice of Forensic Chrmistry.

Answer B, C, D also, not just A.

This is a true story. A lawyer in Bloomington, Indi. ana, wanted to impress a judge with the high num ber of PCB molecules that a typical person takes in with each breath. He called Prof. Hites for this fact but he did not have this information at hand. How. ever, a student of his had recently determined that the flux of PCBS from the atmosphere to Blooming- ton's surface averaged 50 ug m year. You may assume that the area of Bloomington in 100 -2

what is the principle of GC-MS?

From the following data (ESSAY DPPH & METHANOL), make a graph of the adjusted model Concentration (x-axis) vs. % inhibition (y-axis), provide the equation that is given and explain its behavior in a broad way. Do this activity step by step please

X + Untitled spreadsheet - Google St x (166) [Spreadsheet] Find Activatic x G how to insert upvisayas.net/lms3/mod/quiz/attempt.php?attempt=56715&cmid=77345 PV LMS III GUIDES TRAINING VIDEOS ▾ Help Desk 17 - General Chemistry II - Section 1 (S. My courses Chem 17 -1 (SS 21-22) / Chemical kinetics / Activity 5.2 (Part 3) A certain reaction has the following reaction constant values at various temperatures: k, min¹ T, °C 3.50 x 10-5 0 6.76 x 10-4 20 7.11 x 10-² 40 4.06 x 10-² 60 What is the activation energy (expressed in kJ/mol) of this reaction? Answer with one decimal place, without the unit h

use analytical separation and analyses to outline analytical separation method protocols that can be employed to recover extremely high deposit of heavy metals and particulate matter in the river making wholesome for drinking in illegal mining communities .

What roles do solvent, density and polarity play in liquid/liquid extraction

Are these systems moderated, explain. A. An aqueous solution of plutonium nitrate  B. A tray of uranium trioxide (UO3) powder, containing 1% moisture.

Q. . CLO 1.1 Write a note on importance of analytical instruments in petroleum and petrochemical industries. Q. CLO 1.2 How do process control techniques contribute to improving product quality in industry.