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Number 2 and 4 please, thanks!
BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions....
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...
View the attachment and answer the following questions: A. The Beer's law relationship was established by...
View the attachment and answer the following questions:
A. The Beer's law relationship was established by measuring the
absorbance of:
A) Several solutions at one wavelength.
B) One solution at several wavelengths.
C) Several solutions over a range of wavelengths.
D) One solution at one wavelength.
B. The y-intercept in Graph B has:
A) 3 decimal places because the Spec 20 displayed 3 decimal
places for each reading.
B) 3 decimal places because there are 3 significant figures in
the...
questions #1-3 please Questions. Beer's Law (1-5) The actual a value for Red 40 is 2.7...
questions #1-3 please
Questions. Beer's Law (1-5) The actual a value for Red 40 is 2.7 x 10 L/mole cm at 500 nm. Use this value, plus your highest absorbance reading at 500 nm, the b value of 1.0 cm and equation (1) to calculate the molarity (moles/L) of the dye. 2. The FW for Red 40 is 496 g/mole. Recalculate its concentration as g/L. Compare this value with the concentration of your original Kool Aid solution. The ratio of...
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...
SPECTROMETRIC ANALYSIS COBALT CHLORIDE Name: Section: Date: Pre-Lab Questions 1. What is Beer's law and what...
SPECTROMETRIC ANALYSIS COBALT CHLORIDE Name: Section: Date: Pre-Lab Questions 1. What is Beer's law and what do each of the variables in Beer's law represent? of distiled vateris aeto of 0.150 M solution of CoCla, what is the concentration ot the resulting solution? Show your work. 3. What is the color of a solution containing a compound that absorbs most strongly at 460 nm?
please provide the answer step by step for all the questions. thank you 2. a. was...
please provide the answer step by step for all the
questions. thank you
2. a. was The analysis of the complex formed between Cu(I) and 1,10-phenanthroline conducted using molecular spectroscopic method. The results showed that this complex has a molar absorptivity (8) of 7000 L cm'mol and maximum wavelength absorption (1) of 435 nm. Calculate the absorbance of a 6.77 x 10-6 M solution of the complex when measured in a 1.00 cm cell at wavelength of 435 nm. b....
1) A standard Beer's law graph of complex lon concentration (2 SF) versus absorbance (3 SF) was prepared and...
1) A standard Beer's law graph of complex lon concentration (2 SF) versus absorbance (3 SF) was prepared and the equation describing the straight line is reported through Excel to be: A 11875 C (A: absorbance, C: concentration, M) Next, the following data was gathered in order to determine the Keq for the complex lon formation reaction. Calculate the value of K (6 pts) Stock sin [SCN'] 0.0023 M Stock sin (Fe") 0.0023 M A117750 Absorbance (complex ion) K11876 0103-11150...
EXPERIMENT #13 - Partitioning and Spectroscopic Identification of Food Dyes Answer the following questions 1. In...
EXPERIMENT #13 - Partitioning and Spectroscopic Identification of Food Dyes Answer the following questions 1. In the column, the stationary phase is hydrophilic hydrophobic Tries 0/1 2. Which dye will be removed first from the column? (with 15% ethanol) red blue Tries 0/1 3. Which dye will be removed last from the column? (with 95% ethanol) blue yellow Tries 0/1 4. If a standard dye solution, with concentration of 10 μg/mL has an absorbance of 0.720 at a wavelength of 630...
Need help for questions 2 and 4 G. C. 1-7 Determination of the Dye Concentration in...
Need help for questions 2 and 4
G. C. 1-7 Determination of the Dye Concentration in a Powdered Drink G. C. 1-7: PART 2 GROUP DISCUSSION QUESTIONS Lab partners' name: 1. Your TA will provide you with the correct concentration of the dye in the powdered drink solution. Calculate the percentage error for your data. (experimental value - accepted value) accepted value 2. The empirical formula for the Brilliant Blue dye is CanHyN,O,S, Na2 and the formula weight i 79286...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a)...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a) Make a plot of absorbance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the absorbance on the yaxis and concentration on the cas. b) Make a plot of % transmittance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the transmittance on...
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...
View the attachment and answer the following questions:
A. The Beer's law relationship was established by measuring the
absorbance of:
A) Several solutions at one wavelength.
B) One solution at several wavelengths.
C) Several solutions over a range of wavelengths.
D) One solution at one wavelength.
B. The y-intercept in Graph B has:
A) 3 decimal places because the Spec 20 displayed 3 decimal
places for each reading.
B) 3 decimal places because there are 3 significant figures in
the...
questions #1-3 please
Questions. Beer's Law (1-5) The actual a value for Red 40 is 2.7 x 10 L/mole cm at 500 nm. Use this value, plus your highest absorbance reading at 500 nm, the b value of 1.0 cm and equation (1) to calculate the molarity (moles/L) of the dye. 2. The FW for Red 40 is 496 g/mole. Recalculate its concentration as g/L. Compare this value with the concentration of your original Kool Aid solution. The ratio of...
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...
SPECTROMETRIC ANALYSIS COBALT CHLORIDE Name: Section: Date: Pre-Lab Questions 1. What is Beer's law and what do each of the variables in Beer's law represent? of distiled vateris aeto of 0.150 M solution of CoCla, what is the concentration ot the resulting solution? Show your work. 3. What is the color of a solution containing a compound that absorbs most strongly at 460 nm?
please provide the answer step by step for all the
questions. thank you
2. a. was The analysis of the complex formed between Cu(I) and 1,10-phenanthroline conducted using molecular spectroscopic method. The results showed that this complex has a molar absorptivity (8) of 7000 L cm'mol and maximum wavelength absorption (1) of 435 nm. Calculate the absorbance of a 6.77 x 10-6 M solution of the complex when measured in a 1.00 cm cell at wavelength of 435 nm. b....
1) A standard Beer's law graph of complex lon concentration (2 SF) versus absorbance (3 SF) was prepared and the equation describing the straight line is reported through Excel to be: A 11875 C (A: absorbance, C: concentration, M) Next, the following data was gathered in order to determine the Keq for the complex lon formation reaction. Calculate the value of K (6 pts) Stock sin [SCN'] 0.0023 M Stock sin (Fe") 0.0023 M A117750 Absorbance (complex ion) K11876 0103-11150...
Need help for questions 2 and 4
G. C. 1-7 Determination of the Dye Concentration in a Powdered Drink G. C. 1-7: PART 2 GROUP DISCUSSION QUESTIONS Lab partners' name: 1. Your TA will provide you with the correct concentration of the dye in the powdered drink solution. Calculate the percentage error for your data. (experimental value - accepted value) accepted value 2. The empirical formula for the Brilliant Blue dye is CanHyN,O,S, Na2 and the formula weight i 79286...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a) Make a plot of absorbance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the absorbance on the yaxis and concentration on the cas. b) Make a plot of % transmittance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the transmittance on...
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