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11 Dec 2019

The dazzling colors seen in fireworks are due to different metal compounds, which are heated to high temperatures, similar to flame tests. What metals are responsible for the following colors seen in fireworks? A.) Yellow-Orange B.) Blue-Green C.) Red-Orange

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Nelly Stracke
Nelly StrackeLv2
13 Dec 2019

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Related questions

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

The component elements for four binary molecular compounds are shown with different colors on the following periodic table.

What is the chemical formula for the simplest compound likely to be formed in each case?

a. Blue Compound

b. Greem Compound

c. Yellow Compound

d. Red Compound

Show you work!

In a flame test:

1. Boron burns green/blue and Arsenic burns deep blue, Molybdenum burns yellow/green, and Rubidium burns red. Which light has the most energy in it? Which has the least?

2. Magnesium and Berilyium have similar flame test results, but Calcium has a very different flame. What's different about the available orbitals for Calcium that could account for this?

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