lab report 2_summer

# Lab report 2_summer - Atomic Emission Spectra Part ICalibration of Spectroscope Discussion Questions Question 1 It can be said that the lines in

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Atomic Emission Spectra Part I—Calibration of Spectroscope 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

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= - v R1m2 1n2 . - = ( - ) 16 8136E 5 R 122 132 . - 16 8136E 5 = ( . ) R 0 1388888888 . R 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% Question 4:

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When hydrogen atoms emit light it gives off a bluish colour. There are four lines which the hydrogen
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## This note was uploaded on 11/11/2010 for the course CHEMISTRY CHEM1800 taught by Professor Krista during the Winter '10 term at UOIT.

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Lab report 2_summer - Atomic Emission Spectra Part ICalibration of Spectroscope Discussion Questions Question 1 It can be said that the lines in

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