chem 2
Part One (Flame Test):
1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame
Solution
Name
Color description
1
Barium
Lime green
2
Calcium
Red
3
Sodium
Yellow
4
Rubidium
Purple
5
6
Potassium
Lithium
Blue
Pink
Unknown 1
Sodium
Yellow
Unknown 2
Potassium
Blue
2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.
Unknown 1 was sodium because the flame was yellow. Unknown 2 was Potassium because flame was blue.
Part Two (Spectroscopy):
1. Create and complete a data table for Part Two of the lab. It should include the name of the element, the colors, and the wavelength values of the observed lines.
1
2
3
4
5
6
7
8
9
Hydrogen(nm)
Purple,410
Blue,440
Bright green,510
Lime green,535
Green yellow,550
Yellow, 575
Bright red, 655
Red, 670
Dark red, 700
Helium
Blue,445
Green,510
Dark yellow, 585
Bright red, 690
Dark red,735
Sodium
Light yellow, 580
Dark yellow,585
Yellow/orange 595
Neon
Violet/blu 420
Dark green 525
Green 520
Lime green 525
Yellow 575
Dark yellow580
Light red 700
Red 710
Dark red 720
Mercury
Blue/ violet 430
Dark blue450
Light green 540
Green/yellow 550
Yellow 570
Light red 675
Red 690
Dark red 710
2. Describe the line spectrum of the star. Give the color and wavelength value of the five brightest lines in the spectrum.
There was 18 different lines of the spectrum of the star. Some where more thick than others. The spectrum ranged from violet to dark red. Five brightest lines are blue 440nm, green 500nm, violet 404nm, violet 410nm, violet/blue 420nm.
Conclusion:
1. Explain, in your own words, why different elements produce different colors of light when heated. Different elements produce different colors of light when heated because they are able to get to a different energy state, and then they lose energy from heat and the flame changes color.
2. Why do you think
1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame
Solution
Name
Color description
1
Barium
Lime green
2
Calcium
Red
3
Sodium
Yellow
4
Rubidium
Purple
5
6
Potassium
Lithium
Blue
Pink
Unknown 1
Sodium
Yellow
Unknown 2
Potassium
Blue
2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.
Unknown 1 was sodium because the flame was yellow. Unknown 2 was Potassium because flame was blue.
Part Two (Spectroscopy):
1. Create and complete a data table for Part Two of the lab. It should include the name of the element, the colors, and the wavelength values of the observed lines.
1
2
3
4
5
6
7
8
9
Hydrogen(nm)
Purple,410
Blue,440
Bright green,510
Lime green,535
Green yellow,550
Yellow, 575
Bright red, 655
Red, 670
Dark red, 700
Helium
Blue,445
Green,510
Dark yellow, 585
Bright red, 690
Dark red,735
Sodium
Light yellow, 580
Dark yellow,585
Yellow/orange 595
Neon
Violet/blu 420
Dark green 525
Green 520
Lime green 525
Yellow 575
Dark yellow580
Light red 700
Red 710
Dark red 720
Mercury
Blue/ violet 430
Dark blue450
Light green 540
Green/yellow 550
Yellow 570
Light red 675
Red 690
Dark red 710
2. Describe the line spectrum of the star. Give the color and wavelength value of the five brightest lines in the spectrum.
There was 18 different lines of the spectrum of the star. Some where more thick than others. The spectrum ranged from violet to dark red. Five brightest lines are blue 440nm, green 500nm, violet 404nm, violet 410nm, violet/blue 420nm.
Conclusion:
1. Explain, in your own words, why different elements produce different colors of light when heated. Different elements produce different colors of light when heated because they are able to get to a different energy state, and then they lose energy from heat and the flame changes color.
2. Why do you think