Predict the result when this reaction happens * CH¿OH + 2 Na PH;ONa + H2 2 It will form a brown precipitate There will be bubbles The solution will turn black The solution will turn yellow Test used to determine phenols from alcohols * Lucas test lodoform test Iron chloride test O Grignard test How will you separate a solution of benzene + CHCI3? * Sublimation Filtration Distillation Crystallization

Predict the result when this reaction happens * CH¿OH + 2 Na PH;ONa + H2 2 It will form a brown precipitate There will be bubbles The solution will turn black The solution will turn yellow Test used to determine phenols from alcohols * Lucas test lodoform test Iron chloride test O Grignard test How will you separate a solution of benzene + CHCI3? * Sublimation Filtration Distillation Crystallization

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...

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1. What is the most appropriate way to dispense 1.38 g of solid sodium chloride? With a graduated cylinder With a graduated pipette OWith a spatula With a pasteur pipet 2. Steam distillation is typically used for Isolation of organic compounds with low boiling points Isolation of organic compounds with high boiling points Removing water from an organic solution Purification of inorganic mixtures O O O O
A solution of concentration 23.27 g/L shows a certain absorbance when analyzed in a cuvette using a spectrophotometer. The solution is then diluted and absorbance re-measured. The new absorbance found to be 0.17 times the first value. What is the concentration of the diluted sample? Select one: A. 136.882 g/L B. 39.559 g/L C. 0.007 g/L D. 1.700 g/L E. 3.956 g/L
Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 60. What is/are the purpose/s of heating sodium carbonate in 270°C for one hour before using it in the standardization of hydrochloric acid? 1. To remove carbon dioxide that is generated during the neutralization reaction II. To remove moisture III. To convert sodium barbonate to sodium bicarbonate a. I, II and III C. I only b. II only d. II and III 61. The process by which the exact concentration of a solution is determined: a. Dissolution C. Standardization Titration b. Neutralization d. 62. The function of Quality Control include the following, except: a. C. Analytical control Planning b. Auditing d. Inspection control
2. 100 12 133 134 1 0 С6H8O 4000 9 HSP-45-691 8 3000 1 : 7 1 T 6 2000 5 ppm NAVENUMBERI : 4 T 3 1500 4:2 T 2 T T 1 wwwm 1000 0 500 DEPT-90 DEPT-135 - 200 180 160 140 120 COS-11-743 لد 100 ppm 80 60 40 20 m 0
The spectrophotometer is set at 600 nm. The absorbance of each cuvette is read. The data is shown below: Cuvette 1 is the clank Cuvette # ml albumin Absorbance 0. 0.2 .063 3 0.4 .163 4. 0.6 .187 0.8 .253 1.0 .289 Using this data, plot an Excel graph showing absorbance (y-axis) vs ml albumin (x-axis). Find the correlation coefficient (r). R2 > 0.99 = excellent data; r2 0.98-0.95 good data r2 0.94 -0.90 = fair data. How would you describe this data?- To find the relative sensitivity, for each of tubes 2-6 (neglect blank), perform the following operation absorbance (Lowry)/Absorbance (Biuret x 0.5 gram albumin (Biuret)/0.05 gram (Lowry) x 200 ml (Lowry)/100 mL (Biuret). This implifies to Relative sensitivity = 20 dilution factor x absorbance (Lowry)/Absorbance (Biuret). Report your relative sensitivity as an average of all 5 values.
Which analytical separation method is best for recovering river bodies that are polluted by heavy metals and particulate matter. Explain your analytical process of choice.
Please short answer
1. What are fibers and where are they found? How could forensic scientists use fibers to solve a crime? 2. Define the word probative. What is the probative value of a fiber in a forensic investigation? 3. Describe steps you would take from collecting a fiber(s) at a crime scene to performing an analysis to determine its identity. 4. Which of the 6 fiber types you observed are natural? Which are man-made? 5. Are fibers classified or individualized? Why?
Weighted average if these values Value-7.00, 8.00, 9.00 Weight-75.0%, 15.0%, 10.0%
16- 23
66 Match the description with the name of the drug. [Sorry there is no partial credit for matching questions) what oplate is found in some cough syrups? What drug is used to treat heroin overdosing? What drug is used to treat heroin addiction, but it is still addictive What drug is used in a patch for chronic pain management? Tolerance for a drug means that over time the dosage can be decreased to have the same effect as before. True False Opiates are all addictive True False Methadone answer not given novocaine "Narcan" or naloxone codeine fentanyl Endorphins and morphine bind to the same receptor sites in the brain True False Acupuncture causes the body to produce endorphins which is the body's own pain killers True False The histamine molecule that sits on the receptor sites in the respiratory system is a different molecule than the one that affects the receptor sites in the stomach True False
Carbon dioxide concentration (parts per million) Examine the graph and answer the following questions. Part A Atmospheric Carbon Dioxide What was the average rate of increase in carbon doxide concentration between 1900 and 19407 410 400 Express you answer in parts per million per year to two significant figures. 300 380 a ? 370 360 ppm/year 350 340 Submit Bequest Anawer 330 320 310 Part 8 Complete previous parts) 300 290 - 1860 1880 1900 1920 1940 1960 1980 2000 2020 Provide Feedback Next> Year