Data Analysis for Part A. Use your table of wavelength and colorobserved to answer the follwoing:
1. Over what wavelength rage do you observe Red? Yellow? BlueSummarize these ranges below your table.
Data Anaylsis for Part B.By referring to your table, answer thequestions below:
3a. Examine a set of solutions having the same concentration.Does the wavelength absorbed max change with the anion, the cationor both? what do you conclude is causing the absorbance?
3b. Examine pairs of solutions having the same compound butdifferent amounts of compound in the solution(differentconcentrations). Does the absorbance intensity change withconcentration? Write a sentencesating this and suggest areason.
4.Now consider the relationship between the color of thesolution and the wavelength, (plus and minus 5nm) max, assoicatedwith the greatest absorbance by nswering the followingquestions:
a. by referring to part A, write down the color thatcorrresponds to the wavelength max of the cobalt solution. Comparethis color with the observed color of the cobalt solution. Arethese colors the same or different? Write a sentence summarizingthis and suggest an explanation.( You may find it helpful to reviewthe concept o the colors of light transmitted vs the colors oflight absorbed, which is easily visulaized by drawing out theprimary color wheel).
b. Repeat this analysis for the nickel solutions and write asentence summarizing your findings and suggest anexplanation.
Data Anaylsis for Part C.
5.why do sodium chloride and sodium nitrate produce the samecolor flame?
6.Report they identity of your unknown and your evidence forthis determination.
7.Consider the identity the emission spectra of the cobalt andnickel salts. Write down the approximate wavelength correspondingto the observed colors. Compare these values with those youobtained in Part B.4. Are they the same or different? Can youexplain your observation?
Part A: The relationshiop between color and wavelength Part C. CompoundIon flamecolor
Nm Color LithiumChloride hotpink
700 red CopperIIchloride lightblue
680 redorange Unknown#1 purpleorange
660 orange SodiumNitrate Orange
640 orange StrontiumNItrate Orange-red
620 orangeyellow NickelChloride brightorange
600 lightorange potassiumsulfate orange
580 yellow sodiumchloride brightorange
560 yellow cesiumchloride pinkishorange
540 yellow bariumNItrate lightgreen
520 yellowgreen calciumnitrate red-orange
500 green
480 dark blue
460 oceanblue
440 dark blue
420 oceanblue
400 purpleblue
Part B.Solution Molaritymax Colorofsolution Wavelengthmaxnm AbsorbanceIntensity (nm)
CoSo4 x7H20 0.05M lightpink 517.80 .262
0.10M darkpink 512.20 .394
CoCIn x6H20 0.05M lightpink 515.30 .232
0.10M pink 511.20 .809
Ni(NO3)2 x 6H20 .05M seafoamgreen 396 .268
.10M seafoamgreen 396 .528
NiSo4 x6H20 .05M lightseagreen 389 0.282
.10M seagreen 395 0.501
Data Analysis for Part A. Use your table of wavelength and colorobserved to answer the follwoing:
1. Over what wavelength rage do you observe Red? Yellow? BlueSummarize these ranges below your table.
Data Anaylsis for Part B.By referring to your table, answer thequestions below:
3a. Examine a set of solutions having the same concentration.Does the wavelength absorbed max change with the anion, the cationor both? what do you conclude is causing the absorbance?
3b. Examine pairs of solutions having the same compound butdifferent amounts of compound in the solution(differentconcentrations). Does the absorbance intensity change withconcentration? Write a sentencesating this and suggest areason.
4.Now consider the relationship between the color of thesolution and the wavelength, (plus and minus 5nm) max, assoicatedwith the greatest absorbance by nswering the followingquestions:
a. by referring to part A, write down the color thatcorrresponds to the wavelength max of the cobalt solution. Comparethis color with the observed color of the cobalt solution. Arethese colors the same or different? Write a sentence summarizingthis and suggest an explanation.( You may find it helpful to reviewthe concept o the colors of light transmitted vs the colors oflight absorbed, which is easily visulaized by drawing out theprimary color wheel).
b. Repeat this analysis for the nickel solutions and write asentence summarizing your findings and suggest anexplanation.
Data Anaylsis for Part C.
5.why do sodium chloride and sodium nitrate produce the samecolor flame?
6.Report they identity of your unknown and your evidence forthis determination.
7.Consider the identity the emission spectra of the cobalt andnickel salts. Write down the approximate wavelength correspondingto the observed colors. Compare these values with those youobtained in Part B.4. Are they the same or different? Can youexplain your observation?
Part A: The relationshiop between color and wavelength Part C. CompoundIon flamecolor
Nm Color LithiumChloride hotpink
700 red CopperIIchloride lightblue
680 redorange Unknown#1 purpleorange
660 orange SodiumNitrate Orange
640 orange StrontiumNItrate Orange-red
620 orangeyellow NickelChloride brightorange
600 lightorange potassiumsulfate orange
580 yellow sodiumchloride brightorange
560 yellow cesiumchloride pinkishorange
540 yellow bariumNItrate lightgreen
520 yellowgreen calciumnitrate red-orange
500 green
480 dark blue
460 oceanblue
440 dark blue
420 oceanblue
400 purpleblue
Part B.Solution Molaritymax Colorofsolution Wavelengthmaxnm AbsorbanceIntensity (nm)
CoSo4 x7H20 0.05M lightpink 517.80 .262
0.10M darkpink 512.20 .394
CoCIn x6H20 0.05M lightpink 515.30 .232
0.10M pink 511.20 .809
Ni(NO3)2 x 6H20 .05M seafoamgreen 396 .268
.10M seafoamgreen 396 .528
NiSo4 x6H20 .05M lightseagreen 389 0.282
.10M seagreen 395 0.501
Related textbook solutions
Basic Chemistry
Principles of Chemistry Molecular Approach
Principles of Chemistry Molecular Approach
Chemistry: Structure and Properties
Chemistry: A Molecular Approach
Chemistry: A Molecular Approach
Principles of Chemistry: A Molecular Approach
Chemistry: The Central Science
Related questions
Just need help answering the ***** question under conclusions. here is my worksheet with information
Record your absorbance measurements for the copper (II) sulfate solution in the table below.
| Wavelength (nm) | Absorbance |
| 400 | 0.00 nm |
| 420 | 0.00 nm |
| 440 | 0.00 nm |
| 460 | 0.00 nm |
| 480 | 0.00 nm |
| 500 | 0.00 nm |
| 520 | 0.00 nm |
| 540 | 0.00 nm |
| 560 | 0.02 nm |
| 580 | 0.05 nm |
| 600 | 0.09 nm |
| 620 | 0.14 nm |
| 640 | 0.22 nm |
| 660 | 0.35 nm |
| 680 | 0.50 nm |
| 700 | 0.63 nm |
Record your absorbance measurements for the cobalt (II) chloride solution in the table below.
| Wavelength (nm) | Absorbance |
| 400 | 0.00 nm |
| 420 | 0.1 nm |
| 440 | 0.07 nm |
| 460 | 0.07 nm |
| 480 | 0.16 nm |
| 500 | 0.23 nm |
| 520 | 0.22 nm |
| 540 | 0.13 nm |
| 560 | 0.07 nm |
| 580 | 0.04 nm |
| 600 | 0.00 nm |
| 620 | 0.00 nm |
| 640 | 0.00 nm |
| 660 | 0.00 nm |
| 680 | 0.00 nm |
| 700 | 0.00 nm |
Data Analysis
Create and save a graph of absorbance (y-axis) versus the wavelength (x-axis) for both copper (II) sulfate and cobalt (II) chloride. Click the graphing icon below to create your graph. 
Experiment 2: Measure Absorbance versus Concentration for Cu+2 Ions
Lab Results
What wavelength did you use to measure the absorbance of the copper (II) sulfate solutions?
| 700 nm |
Data Analysis
Create and save a graph of absorbance (y-axis) versus the concentration of the copper (II) sulfate solutions (x-axis). Click the graphing icon below to create your graph. 
The y-intercept of the plot of absorbance versus concentration is approximately 0. Why is this?
| It should be a straight line obtained by having a slope of = 1 and y-intercept = 0. |
Experiment 3: Determine the Cu+2 Concentration in Unknown Solutions of Copper (II) Sulfate
Lab Results
How many mL of the unknown solutions did you use for your absorbance measurements?
| 10 mL |
Data Analysis
Determine the copper (II) sulfate concentrations in your two unknown samples from the calibration plot.
| wavelength used: 700 nm absorbance unknown: a. 0.08 b. 0.12 |
Conclusions
*******Were the unknown solutions more or less concentrated than the copper (II) sulfate solution used in experiment 1?
Given the data in the table below, what is the concentration of the unknown solution? Both solutions contain the same substance.
| standard solution concentration | 1.25 M |
| standard solution absorbance | 0.75 |
| unknown solution absorbance | 0.38 |
| 0.63 M is the concentration of the unknown solution. |
