Prelab Introduction to Qualitative Analysis part 2

IN QUALITATIVE ANALYSIS OF GROUP 3 CATIONS , COMPLETE THIS TABLE AND WRITE THE CHEMICAL REACTIONS FOR THE IONS THAT OCCURED.   COMPLETE THIS TABLE:   Group IIICations ConfirmatoryReagent Result/Observation SubstanceFormed Inference

The Halides experiment is a qualitative analysis type of experiment. Which of the following is not a qualitative observation? O Color change Increase in temperature O Formation of a gas (bubbles) Formation of an insoluble solid (precipitate)

PART ONE: Preparation of FECNS* Solution Prepare the two solutions in table 1 by accurately measuring the required volumes of distilled water and CNS into two labeled test tubes. The absorbance of the solutions must be measured soon after adding the Fe" solution from a buret. TABLE 1 Fe 5 ml 5S mL Solution Distilled Water CNS 2 mL Total Volume 3 ml 2 ml 10 ml 3 mL 10 ml In this part of the experiment you are to explore what the above quote means. As a PRELIMINARY Exercise, formulate a hypothesis as to what would happen under each of the following circumstances: 1. 1ml of 0.0020 M CNS' solution is added to the unused portion of solution 1 in the test tube 2. One drop of 0.20 M CNS solution is added to the unused portion of solution 2 in the test tube.

The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0133 m= 0.0266 0.0532 0.106 0.213 Absorbance 0.1271 What is the intercept of the linear regression line? 0.08531 0.5388 1.069 Use a spreadsheet program, such as Microsoft Excel, to graph the data points and determine the equation of the best-fit line. 1.954 What is the slope of the linear regression line formed by these points? M-1

Case #5 Case #6 Jeepers! Someone snuck into the Movie Madness studio and Someone stole the net from the High Wire act at the Crazy Circus! Without it, the show can't go on! stole the reels for the new film! The CSI team found a liquid at At this crime scene, there were traces of a liquid, 9 drops (at ,059 drop) were found to contain 279C, 119790, and ,06039H, What was the empirical formula of the compound? Who committed the heinous act? this crime scene, When the ,77009 sample was analyzed, it was found to contain ,04679H and ,724390, What was the empirical formula? Who should the police question? a Case #7 Case #8 Old Man Higgins had his favorite cane taken from him when he was out for a walk through Sinister Park, The CSI team found traces of a uhite powder at this crime scene, To be 61,67%CL, A flame test yielded a yellow flame, indicating the remaining portion was sodium, What was the empirical formula of the compound? What kind of person would steal an antique cane? The original…

Read the following short piece titled "The Status of Qualitative Research in Criminology." by Jody Miller, read pages 69- 72. Discuss the validity and reliability issues in relation to qualitative studies.

HP TrueVision HD 4 Texas Workfor Mộc Homework × W. College Physic mical App AN Careers eagleonline.hccs.edu/courses/188795/assignments/3601808 valnabie diler reD 4 dl 10.1Tam Constants | Periodic Table Part O Complete the fourth row. Complete the following table by calculating the missing entries and indicating whether the solution is acidic or basic. Express your answer using two decimal places. Acidic or [H+] [OH-] pH pOH basic? 7.4x10-3 ΑΣφ 3.3x10-10 M pH 8.25 5.73 Is to fa ho II 10 insert

Absorbance 1.40 Beer's Law Plot 1.20 1.00 0.80 0.60 0.40 0.20 0.00 0 10 20 30 40 50 Concentration (M x 105) D The slope for the line is 80.23. Use the Beer's Law plot provided to determine the concentration for a solution with absorbance = 0.5786. M

Document1 - Word Search (Alt+Q) References Mailings Review View Help Write the corresponding letters to the following descriptions. Each proposal can be associated with 0 or 1 match and each letter is not necessarily associated with a proposal. a. [Ar] 4s? b. 1s 2s2p63s23p3 c. 1s2s2p2 d. [Ne] 3s23ps e. [Ar] 4s23d10 f. 1s22s! g. None of those answers 1. I am a halogen 2. I am a transition metal 3. I am alkaline 4. I have exactly 2 single electrons 5. I am the smallest of the atoms presented here 6. I have exactly 3 valence electrons 7.I am the most paramagnetic of the atoms presented here 8. I am the copper 9.I am isoelectronic with Ti2+ IF cessibility: Good to go IA 16 SIS

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

Suspect #1: George Norman Suspect #2: Becky Baker George Norman recently Becky Baker is a world famous chef. She had just finished baking a cake at the time of the crime. The recipe called for baking soda. The formula for baking soda (sodium bicarbonate) is had an accident where he cut himself with a Alaia knife. He cleaned the wound with rubbing alcohol. The formula for rubbing alcohol Bak ing Seda NaHCOз. (isopropanol) is C3H80. Suspect # 3: Liz Lemon Suspect #4: Ben Linus Liz Lemon just had her nails Ben Linus had been walking done, and she still has traces of nail polish remover on her hands. Nail around in the rain for about an hour before the crime polish remover he was suspected contains acetone. Acetone of occurred. He The formula for Polish was dripping wet with water acetone is C3H60. renover at the time. The formula for water is H2o.

Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?

Number 2,3,and 4

The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0179 0.0358 0.0716 0.143 0.286 Absorbance 0.1425 0.1896 0.5722 1.126 2.110

please highlight the correct answer

[References] Use the References to access important values if needed for this question. Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice, complete the following table, where N is a number. log N 7.92 1.867 -1.402 Submit Answer Retry Entire Group 4 more group attempts remaining Previous Next Save and Exit

This question has multiple parts. Work all the parts to get the most points. Use the References to access important values if needed for this question. 18 16 14 12 10 8 6 4. Choose the correct relationship for the plot shown above. O a direct proportion O an inverse proportion O linear with a positive slope and nonzero y-intercept O linear with a negative slope and nonzero y-intercept Submit Cengage Learning | Cengage Technical Support MacBook Air DII E5 F6 EZ FA F9 F10 F 2$ & * ) 4 5 6 7 8 * 00

I need help with one of my pre-lab questions which I want to understand. Its question number 2, the one that highlighted. I don't want to make it over-complicated, I want something that I can understand.

The best fit curve line to an absorbance vs. concentration plot for standard solutions of a dye has a slope of 0.1815 mL/mg and intercept of 0.0477. A sample solution prepared of the same dye has an absorbance of 0.464 at the wavelength used to establish the Beer's law plot. What is the concentration of dye in the prepared solution? Select one: O a. 0.132 mg/mL b. 2.29 mg/mL O c. 0.464 mg/mL O d. 2.82 mg/mL e. 0.0365 mg/mL Next page Law Tutorial Part 2 Jump to... Exp #9 - Laboratory Practical► Worksheet étv A

The following Absorbance vs concentration of nitrite graph is obtained for a set of data: Absorbance Vs Concentration y = 1.6628x+0.0373 R? = 0.9893 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0.2 0.4 0.6 0.8 1 Concentration of nitrite (mg/L) Determine the concentration of unknown solution for which the absorbance is determined as 0.69 A. More data is required В. 0.69 С. 0.65 D. 0.39 Absorbance

A direct ELISA experiment was done to determine the amount of protein present in a sample. A standard curve was prepared by plotting log Absorbance versus log concentration of protein in (ng/mL). The equation of the line is Y= 0.895 X -1.25. If an unknown protein shows an absorbance of 1.23. Calculate the concentration of this protein in the sample in (ng/mL).

Supply the missing information in the table. (Given in Blue). Answers in scientific notation should be in this sample format >>> 1.0 x 10-14