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SPECTROMETRIC ANALYSIS COBALT CHLORIDE Name: Section: Date: Pre-Lab Questions 1. What is Beer's law and what...
Beer’s Law experiment Beer's Law Name Date PRE-LAB QUESTIONS 1. What is the purpose of the...
Beer’s Law experiment
Beer's Law Name Date PRE-LAB QUESTIONS 1. What is the purpose of the nitric acid in this experiment and why is this important? 2. Why is it important to use the blank reagent in this experiment? Why should you wait until you are ready to record each individual reading with the Spec-20 to add KSCN? 3. 4. Why must the determinations of the unknown be done on the same day the calibration is run? 169
1,2,3 BEER'S LAW - PRE-LAB QUESTION 1. What mass of solid CoCl2 would you need to...
1,2,3
BEER'S LAW - PRE-LAB QUESTION 1. What mass of solid CoCl2 would you need to prepare 250 mL of 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? Show your calculations. 2. Using the solution from the previous problem and distilled water, how would you prepare 100 mL of a 0.060 M solution of CoCl2? (Hint: use the dilution formula) 3. What is Beer's law? Write an equation and describe all terms used in it.
Thanks! BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before...
Thanks!
BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. work for numerical calculations. 1. The wavelength at which a substance absorbs the most light is called the The metal complex Cu(C,N,H)SO, has a purple (violet) color. What would you guess as the value 2. If a solution sample has an extinction coefficient of 7.53 L mol cm,a pathlength of 1.50 cm, and an absorbance of 0.408, what is the concentration...
Chem 162 Experiment 2 Spectrophotometric Determination of Ion Concentration by Beer's Law Pre-Lab Questions a. A...
Chem 162 Experiment 2 Spectrophotometric Determination of Ion Concentration by Beer's Law Pre-Lab Questions a. A sample absorbs 80% of the light passed through it at a certain wavelength. What is the absorbance of the sample at this wavelength? b. What would the absorbance be at the same wavelength if the sample were diluted by half? Assume the same size sample cell was used. 2, A 0.070 M solution has an absorbance ofA = 0.689. If a 1.00 cm path...
answers for this pre/post lab Name: Date: Lab Section Colorimetric Pre/Postlab Questions 1. What iron species...
answers for this pre/post lab
Name: Date: Lab Section Colorimetric Pre/Postlab Questions 1. What iron species give rise to the orange color upon addition of 1,10-phenanthroline to an iron(II) solution? 2. How are percent transmittance and absorbance related algebraically? (Be able to convert %T to 4 and 4 to %7:) 3. What are the five fundamental components of a spectrophotometer? 4. State and define all terms (including units) in the Beer-Lambert law. 5. What is the purpose of preparing a...
#2,3,4 don't redo 1 College Chemistry l- CHE 1550 Prelab 11: Beer's Law Spectroscopy of Cobalt lor 1. Calculate the number of grams of cobalt (ül) nitrate hexahydrate (Co(NO)2 6H 0) needed...
#2,3,4 don't redo 1
College Chemistry l- CHE 1550 Prelab 11: Beer's Law Spectroscopy of Cobalt lor 1. Calculate the number of grams of cobalt (ül) nitrate hexahydrate (Co(NO)2 6H 0) needed to make s0.0 ml of 0.150 M cobalt (Il) nitrate hexahydrate nceniolon:O.ISOM 2. Calculate the concentration of cobalt (Il) ions in each of the test tubes (1) through (5), prepared by diluting your 0.150 M stock solution as instructed in steps 3 and 4 of part A ....
Beer's Law Name: Pre-Lab 1. Show your work on how you calculated the volumes of 0.40...
Beer's Law Name: Pre-Lab 1. Show your work on how you calculated the volumes of 0.40 M NISO4 and H2O needed to make 10 mL of a 0.24 M NISO4 solution. Remember the dilution equation (C1V1 = C2V2). ittonce of light througha sample was
Number 2 and 4 please, thanks! BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions....
Number 2 and 4 please, thanks!
BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions. 1. what is-for the metal complex Cu(C,N,H8),SO4 from your/ class data? 2. Using the known absorbance, pathlength, and concentration of the stock solution, calculate the extinction coefficient (e) for Cu(C,N,H),so, at numerical calculations ma Show all work for 3. Wh at was the absorbance of your unknown solution? Which concentration does this correspond to on your graph? 4. A type of food coloring has...
post-lab questions oncentration of swimming pool / hot tub sample POST-LAB QUESTIONS 1) What happens in the Spect...
post-lab questions
oncentration of swimming pool / hot tub sample POST-LAB QUESTIONS 1) What happens in the Spectrophotometer when a light beam is passed through a solution that has a certain color or color mixtures? 2) Define Beer's Law? (First write the formula, and then explain...) BeeにレauDenis-Absorber) ce- L c e the photos in color above have two samples of the same solution. They have the same color intensity Here we icture where you look from one side. In the...
allylic acid (aspirin) Preparation of DATE SECTION NAME GRADE PARTNER Experiment 33 PRE-LAB QUESTIONS Are the...
allylic acid (aspirin) Preparation of DATE SECTION NAME GRADE PARTNER Experiment 33 PRE-LAB QUESTIONS Are the medicinal properties of aspirin due to acetylsalicylic acid or salicyclic acid? 2. Draw the structure of aspirin. Should this compound test positive with 1% iron(III) chloride solution? Explain your answer. 3. Salicylic acid can irritate the stomach. Draw the structure of the molecule. Circle and name the functional group for groups) responsible for this effect Maonesium hydroxide, MgOH), and magnesium carbonate, MgCo., are often...
Beer’s Law experiment
Beer's Law Name Date PRE-LAB QUESTIONS 1. What is the purpose of the nitric acid in this experiment and why is this important? 2. Why is it important to use the blank reagent in this experiment? Why should you wait until you are ready to record each individual reading with the Spec-20 to add KSCN? 3. 4. Why must the determinations of the unknown be done on the same day the calibration is run? 169
1,2,3
BEER'S LAW - PRE-LAB QUESTION 1. What mass of solid CoCl2 would you need to prepare 250 mL of 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? Show your calculations. 2. Using the solution from the previous problem and distilled water, how would you prepare 100 mL of a 0.060 M solution of CoCl2? (Hint: use the dilution formula) 3. What is Beer's law? Write an equation and describe all terms used in it.
Thanks!
BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. work for numerical calculations. 1. The wavelength at which a substance absorbs the most light is called the The metal complex Cu(C,N,H)SO, has a purple (violet) color. What would you guess as the value 2. If a solution sample has an extinction coefficient of 7.53 L mol cm,a pathlength of 1.50 cm, and an absorbance of 0.408, what is the concentration...
Chem 162 Experiment 2 Spectrophotometric Determination of Ion Concentration by Beer's Law Pre-Lab Questions a. A sample absorbs 80% of the light passed through it at a certain wavelength. What is the absorbance of the sample at this wavelength? b. What would the absorbance be at the same wavelength if the sample were diluted by half? Assume the same size sample cell was used. 2, A 0.070 M solution has an absorbance ofA = 0.689. If a 1.00 cm path...
answers for this pre/post lab
Name: Date: Lab Section Colorimetric Pre/Postlab Questions 1. What iron species give rise to the orange color upon addition of 1,10-phenanthroline to an iron(II) solution? 2. How are percent transmittance and absorbance related algebraically? (Be able to convert %T to 4 and 4 to %7:) 3. What are the five fundamental components of a spectrophotometer? 4. State and define all terms (including units) in the Beer-Lambert law. 5. What is the purpose of preparing a...
#2,3,4 don't redo 1
College Chemistry l- CHE 1550 Prelab 11: Beer's Law Spectroscopy of Cobalt lor 1. Calculate the number of grams of cobalt (ül) nitrate hexahydrate (Co(NO)2 6H 0) needed to make s0.0 ml of 0.150 M cobalt (Il) nitrate hexahydrate nceniolon:O.ISOM 2. Calculate the concentration of cobalt (Il) ions in each of the test tubes (1) through (5), prepared by diluting your 0.150 M stock solution as instructed in steps 3 and 4 of part A ....
Beer's Law Name: Pre-Lab 1. Show your work on how you calculated the volumes of 0.40 M NISO4 and H2O needed to make 10 mL of a 0.24 M NISO4 solution. Remember the dilution equation (C1V1 = C2V2). ittonce of light througha sample was
Number 2 and 4 please, thanks!
BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions. 1. what is-for the metal complex Cu(C,N,H8),SO4 from your/ class data? 2. Using the known absorbance, pathlength, and concentration of the stock solution, calculate the extinction coefficient (e) for Cu(C,N,H),so, at numerical calculations ma Show all work for 3. Wh at was the absorbance of your unknown solution? Which concentration does this correspond to on your graph? 4. A type of food coloring has...
post-lab questions
oncentration of swimming pool / hot tub sample POST-LAB QUESTIONS 1) What happens in the Spectrophotometer when a light beam is passed through a solution that has a certain color or color mixtures? 2) Define Beer's Law? (First write the formula, and then explain...) BeeにレauDenis-Absorber) ce- L c e the photos in color above have two samples of the same solution. They have the same color intensity Here we icture where you look from one side. In the...
allylic acid (aspirin) Preparation of DATE SECTION NAME GRADE PARTNER Experiment 33 PRE-LAB QUESTIONS Are the medicinal properties of aspirin due to acetylsalicylic acid or salicyclic acid? 2. Draw the structure of aspirin. Should this compound test positive with 1% iron(III) chloride solution? Explain your answer. 3. Salicylic acid can irritate the stomach. Draw the structure of the molecule. Circle and name the functional group for groups) responsible for this effect Maonesium hydroxide, MgOH), and magnesium carbonate, MgCo., are often...
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