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  • Topic: Bohr model, Chemistry, Rydberg formula
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Experiment 1: Measurement and Expression of Experimental Data Date Performed: January 23, 2012                                   Armando del Valle Date Submitted: January 23, 2012                                  Chemistry 1045L-8

Lindsey Osterfeld

Purpose
The purpose of this experiment is to review simple mathematical and graphing techniques. In Part A mostly “mathematical treatments of data” will be reviewed as well as a basic review of graphing. Part B will expand on more elaborate graphing techniques.

Exercises
1)
a) 01.501 x 103 4
b) 700.01 5
c) 193005 6
d) 6.010 x 10-4 4
e) 0.070 2
2)
a) 151626 1.52 x 105
b) 0.00844 8.44 x 10-3
c) 0.000010350 1.04 x 10-5
d) 1255 1.26 x 103
e) 33.535 3.35 x 101
3)
a) (6.49 x 105/2) – 45.38 = 324000
b) 5.32 x 10-15 * 2.447 x 1016 = 130.
c) (3.15 x 10-1 – 9.7 x 10-3) * [(4.7 x 10-2)/(2.33 x 10-3)] = 1.5 x 10-2 d) 1.62 x 10-3 + 8.1 x 10-4 = 2.4 x 10-3
e) (0.45 + 167.6)/1.6 x 10-2 = 11000

4)
a) The Bohr radius: 5.29 x 10-11
b) The speed of light: 3.00 x 108
c) Charge of a proton: 1.60 x 10-19
d) Rydberg constant: 1.10 x 107
5)
a) Antilog 0.485 = 3.05
b) Ln 60 = 4.1
c) e-1.41 = .244
d) Log 3.975 x 10-2 = -1.401
e) Antilog 6.86 = 7.24 x 106
f) Log 8.74 = .942
6)
a) 3.8842, 3.8611, 3.8263, 3.8191, 3.8945, 3.8916, 3.8511, 3.8651 b) Mean: 3.86163
c) Standard deviation: 0.02846

7)

Q1: The relationship between temperature and pressure is linear.

8)

Q1: This solution does not follow Beer’s Law.
Q2: The concentration of a solution that has an Optical Density of 0.28 is about 0.3 M. Q3: The concentration of a solution that has an Optical Density of 1.01 is about 1 M.

10)
Q1: The slope of the graph is 5.40 x 10-5 mL/torr.

11)
Q1: y = 103x + 20

Q2:
Experimental Spectrometer Reading (au)| Corrected Wavelength (nm)| 5.82| 619.5|
4.27| 459.81|
4|...
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