Homework Answers
![TTO (NO3)2] = 0.06OM A= 0.29 I= 1 cm A2= 0.14 [CO(NO3)212= ? we thow that A = Excxe E = Alce E = 0.29 = 4.833 0.060 X 1 F2 =](http://img.homeworklib.com/questions/25b55fe0-6f33-11ea-a28d-b52f394e5116.png?x-oss-process=image/resize,w_560)
Add Answer to:
Experiment #9 Post-Lab Problems (continue): 4. If a 0.060 M sample of Co(NO3)2 gave an absorbance...
Suppose a solution of Co(NO3)2 has an extinction coefficient of 5.1L/mol-cm at 505 nm. On graph paper, plot a graph of...
Suppose a solution of Co(NO3)2 has an extinction coefficient of 5.1L/mol-cm at 505 nm. On graph paper, plot a graph of A versus C (mol/L) for solutions of 0.020, 0.040, 0.060, 0.080, and 0.100 M Co(NO3)2 in a 1-cm cell. On the same graph plot, the percent transmittance, or %T, of each solution versus concentration
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate. 1. An amine complex of cobalt(III) is yellow-orange and has a box of 475 nm. The standard curve below is for a set of standards measured at me in a 1.8 cm cell. Use it to answer the questions that follow. 0.8 0.7 0.6 0.5 Ab sorbance 0.4 0.3 0.2 0.1 0 0 0.05 0.1 02 0.25 0.3 0.35 0.15...
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...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate 1 An amine complex of cobalt(III) is yellow-orange and has a larof 475 nm The standard curve below is for a set of standards measured at in a 1.8 cm cell. Use it to answer the questions that follow 08 0.7 05 0.5 Absorbance 04 03 02 09 0 0 0.05 0.1 0.25 0.9 035 15 0.2 Concentrata a Determine...
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...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in order to analyze for manganese by photometry, Mn? in the sample is converted to deep purple MnO.. What reagent is used to bring about this oxidation 4420 2. (1) Write and balance the redox reaction for the oxidation of Mn(II) to Mn(VII). How many electrons are involved? 3. (1/2) Sometimes you get a brown precipitate during the oxidation step in this experiment. What is...
Please help I am completely confused, I included the 2 graphs needed for this post lab....
Please help I am completely confused, I included the 2
graphs needed for this post lab. Thank you!
Postlab Assignments . (a) Using your own standard curve, the line equation you generated and Beer's law equation Equation 1) calculate the molar absorpivity (e) of blue dye. For all your measurem cuvette used is 1.00 cm. Use this as the value of b in Equation 1 ents, the size of (b) Using Beer's law equation again, what does a high value...
help please? this was the only other information given REPORT SHEET Determination of the Solubility-Product Constant...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate. 1. An amine complex of cobalt(III) is yellow-orange and has a box of 475 nm. The standard curve below is for a set of standards measured at me in a 1.8 cm cell. Use it to answer the questions that follow. 0.8 0.7 0.6 0.5 Ab sorbance 0.4 0.3 0.2 0.1 0 0 0.05 0.1 02 0.25 0.3 0.35 0.15...
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...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate 1 An amine complex of cobalt(III) is yellow-orange and has a larof 475 nm The standard curve below is for a set of standards measured at in a 1.8 cm cell. Use it to answer the questions that follow 08 0.7 05 0.5 Absorbance 04 03 02 09 0 0 0.05 0.1 0.25 0.9 035 15 0.2 Concentrata a Determine...
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...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in order to analyze for manganese by photometry, Mn? in the sample is converted to deep purple MnO.. What reagent is used to bring about this oxidation 4420 2. (1) Write and balance the redox reaction for the oxidation of Mn(II) to Mn(VII). How many electrons are involved? 3. (1/2) Sometimes you get a brown precipitate during the oxidation step in this experiment. What is...
Please help I am completely confused, I included the 2
graphs needed for this post lab. Thank you!
Postlab Assignments . (a) Using your own standard curve, the line equation you generated and Beer's law equation Equation 1) calculate the molar absorpivity (e) of blue dye. For all your measurem cuvette used is 1.00 cm. Use this as the value of b in Equation 1 ents, the size of (b) Using Beer's law equation again, what does a high value...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
Most questions answered within 3 hours.
-
How much must I invest today if I want to withdraw 1/3 of my
original investment...
asked 1 hour ago -
What is meant by a “term premium”?
What can explain such a premium? Is it a...
asked 2 hours ago -
23. Which molecule has only covalent bonds? A. CO2 B. Al2O3 C.
Mg3N2
24. The octet...
asked 3 hours ago -
the
total pressure for a mixture of N2O4 and NO2 is 2.20 atm. If Kp=
7.10...
asked 3 hours ago -
Delaware Corp. prepared a master budget that included $22,385
for direct materials, $28,600 for direct labor,...
asked 3 hours ago -
For pesticide HCB (hexachlorobenzene), its logarithmic partition
coefficient log Kow is 5.6. What would be the...
asked 3 hours ago -
A chemist requires 0.422 mil Na2CO3 for a reaction. How many
grams does this correspond to?
asked 3 hours ago -
If the vapor pressure of carvone is approximately 9.4 torr at 99
°C, approximately how much...
asked 3 hours ago -
A juice bottling company is carrying out a test at 10%
significance that the mean population...
asked 3 hours ago -
What is the reflectivity (in percent) needed to keep water at a
temperature near its freezing...
asked 4 hours ago -
Suppose that the average surface temperature of Earth is 300K.
Assume this is uniform over its...
asked 4 hours ago -
Draw the condensed structural formula for alkenes and alkynes or
the line-angle structural formula for cycloalkenes...
asked 4 hours ago