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lab report 2_summer

# lab report 2_summer - Atomic Emission Spectra Part...

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Atomic Emission Spectra Part I—Calibration of Spectroscope y = 126.64x - 173.46 R² = 0.9423 0 100 200 300 400 500 600 700 0 1 2 3 4 5 6 7 Wavelength (nm) Scale Position Calibration of Spectroscope

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Discussion Questions: Question 1: It can be said that the lines in the visible region can be deduced using the Balmer series, since it is only series which can used to see where the lines belong too. Using Balmer series when m = 2, the n 1 value for the hydrogen is also 2. For the red spectral line the n 2 value should be n=3, when it is green-blue, n=4, for the blue, n=5, and violet should be n=6. Question 2: Colour Wavelength (nm) Wavelength(cm) Red 681.36 6.8136E-5 Yellow 5.75 5.75E-5 green/blue 459.74 4.5974E-5 Violet 383.756 3.83756E-5 g1874̅ = g1844 g3436 1 g1865 g2870 1 g1866 g2870 g3440 1 6.8136 g1831g4666 −5 g4667 = g1844 ( 1 2 g2870 1 3 g2870 ) 1 6.8136E g4666 −5 g4667 = g1844 (0.1388888888) g1844 ≈ 105677.77
Question 3: Rydberg Constant Equation from the graph: Y= -321000x + 33200 1/ λ = R (1/n 2 – 1/ n 2 2 ) Y = R (0.25 –X) (Here x= 1/ n 2 2 ) -321000x + 33200 = R (0.25 –X) Let x= 1/ n 2 2 = 1/ 7 2 = 1/49 Thus R = -321000x + 33200 / (0.25 –X) Calculated R= -176395.55 cm- 1 Theoretical R = 1.0973x 10^5 cm- 1 % Error: (1.0973x 10^5 -176395.55)) * 100 / 1.0973x 10^5 = 60%

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lab report 2_summer - Atomic Emission Spectra Part...

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