Homework Answers
Answer:-
This question is solved by using simple concept of relationship between concentration and absorbance which are directly proportional to each other.
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2. A solution of 0.40 M NISO, has an absorbance, X. If this solution is diluted...
Name Lab testructo Experiment 9-Determinations of Cencentrations of Colered Solutions Prelaboratory Exercises i. Iya15.0 inL solon...
Name Lab testructo Experiment 9-Determinations of Cencentrations of Colered Solutions Prelaboratory Exercises i. Iya15.0 inL solon of 25 St Nici i, diluted to a volume or 100 inL (1.00×10/ mL. whar is the mclarity (M of the diluted solution? Show all your steps with the fomals 2.Asoltion of0.40 M NİSO, has an absorbance, X. If this solution is diluted to give a 0.1 M solution, answer the following Will the absorhance of the 0.10 M solution decrease or increase? b....
A 3.0 M solution of NaOH has a volume of 0.40 L. In order to make...
A 3.0 M solution of NaOH has a volume of 0.40 L. In order to make a 0.15 M solution, to what volume in liters should the solution be diluted?
Standard solutions of [Fe(SCN)2-] were prepared and their absorbance measured in order to study the Keq...
Standard solutions of [Fe(SCN)2-] were prepared and their absorbance measured in order to study the Keq for the reaction Fe3+ + SCN- <=> FeNCS2+ A plot of absorbance verses concentration of [Fe(SCN)2-] is shown below. To determine the Keq for the above reaction, 10.00 mL of 0.00200 M Fe(NO3)3 solution is mixed with 5.00 mL of 0.0020 M KSCN and diluted with 5.0 mL 0f 0.10 M HNO3. The absorbance of this red solution is found to be 0.322....
Keq determination 1 0.9 2900X 0.00 R -0.9985 08 Absorbance 0.7 0.6 0.5 0.4 0.3 0.2...
Keq determination 1 0.9 2900X 0.00 R -0.9985 08 Absorbance 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.00005 0.0003 0 0.00035 0.0001 0.00015 0.0002 0.00025 Concentration of Fe(SCN)2-(M) To determine the Key for the above reaction, 10.00 mL of 0.00200 M Fe(NO3); solution is mixed with 5.00 ml of 0.0020 M KSCN and diluted with 5.0 ml of 0.10 M HNO3. The absorbance of this red solution is found to be 0.322. Answer the following questions in sequence to...
A caffeine sample was diluted by a factor of 100 and UV-Vis spectra of diluted solution...
A caffeine sample was diluted by a factor of 100 and UV-Vis spectra of diluted solution showed Absorbance of 0.240 at 275nm. The concentration of diluted sample was determined as 2.76 × 10−2 mMol. What is the Molar Absorptivity (e) of caffeine at 275nm in dilute and in concentrated solution? Consider thickness of a cuvette – 1cm.
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted...
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 μL). The absorbance value of the diluted solution corresponded to a concentration of 6.70×10−6 M . What was...
Question 2 0/2 points A 0.200 M BSA solution has an absorbance of 0.100. What is...
Question 2 0/2 points A 0.200 M BSA solution has an absorbance of 0.100. What is the absorbance of a 0.250 M BSA solution under the same conditions? Report your answer to 3 decimal places. Example: X.XXX Answer: 0.265 % (0.125, 125)
3. What is the pH of a solution that is 0.40 M NaBrO and 0.50 M...
3. What is the pH of a solution that is 0.40 M NaBrO and 0.50 M HBrO (hypobromous acidy? (K, for HBrO 2.3 x 10 4. What is the pH of a solution in which 15 mL of 0.10 MNaOH is added to 25 mL of 0.10 M HCI?
Part A: If the experimental absorbance measured at 567nm for a 0.01985 M solution was 2.936,...
Part A: If the experimental absorbance measured at 567nm for a 0.01985 M solution was 2.936, predict the numerical experimental absorbance value at 567nm for the diluted 0.0007940 M solution. Part B: Using this predicted absorbance value, calculate the molar absorptivity constant (ε). You may assume the path length of light (L) to be 1.22cm.
use the formula A=elc = A=ec A 4.14 x 10-4 M murexide solution has an absorbance...
use
the formula A=elc = A=ec
A 4.14 x 10-4 M murexide solution has an absorbance of 0.734 at 540 nm. What would the concentration of a murexide solution be if the absorbance at 540 nm were 0.501 (Hint: use Eq. 3.3)?
Name Lab testructo Experiment 9-Determinations of Cencentrations of Colered Solutions Prelaboratory Exercises i. Iya15.0 inL solon of 25 St Nici i, diluted to a volume or 100 inL (1.00×10/ mL. whar is the mclarity (M of the diluted solution? Show all your steps with the fomals 2.Asoltion of0.40 M NİSO, has an absorbance, X. If this solution is diluted to give a 0.1 M solution, answer the following Will the absorhance of the 0.10 M solution decrease or increase? b....
Keq determination 1 0.9 2900X 0.00 R -0.9985 08 Absorbance 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.00005 0.0003 0 0.00035 0.0001 0.00015 0.0002 0.00025 Concentration of Fe(SCN)2-(M) To determine the Key for the above reaction, 10.00 mL of 0.00200 M Fe(NO3); solution is mixed with 5.00 ml of 0.0020 M KSCN and diluted with 5.0 ml of 0.10 M HNO3. The absorbance of this red solution is found to be 0.322. Answer the following questions in sequence to...
Question 2 0/2 points A 0.200 M BSA solution has an absorbance of 0.100. What is the absorbance of a 0.250 M BSA solution under the same conditions? Report your answer to 3 decimal places. Example: X.XXX Answer: 0.265 % (0.125, 125)
3. What is the pH of a solution that is 0.40 M NaBrO and 0.50 M HBrO (hypobromous acidy? (K, for HBrO 2.3 x 10 4. What is the pH of a solution in which 15 mL of 0.10 MNaOH is added to 25 mL of 0.10 M HCI?
use
the formula A=elc = A=ec
A 4.14 x 10-4 M murexide solution has an absorbance of 0.734 at 540 nm. What would the concentration of a murexide solution be if the absorbance at 540 nm were 0.501 (Hint: use Eq. 3.3)?
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