Copy of Chem152_AES_Report_111711

Copy of - Name Michelle Bang ID Number 1021913 Quiz Section AG Lab Partner Tessa Barclay Points assigned to tables graphs questions and

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Page 1 of 1 Name: Michel e Bang Quiz Section: AG Points assigned to tables, graphs ID Number: 1021913 Lab Partner: Tessa Barclay questions, and calculations. Chem 152 Experiment #6: Atomic Emission Spectroscopy (AES) Part I . Measuring the Hydrogen Emission Spectrum Part I. An Application of AES: Determination of Sodium Total Points = 60 (5 notebook, 55 template) 5 Part I . Measuring the Hydrogen Emission Spectrum DATA Table 1. Hydrogen Emission Data Spectroscope Data Ocean Optics Spectrometer Color Wavelength, nm violet 435 845.3 blue-green 485 778.2 red 660 657.1 651.3 486.3 A: Data Analysis 2 0.25000 845.3 0.0011830 3 0.11111 778.2 0.0012850 4 0.06250 657.1 0.0015218 1 5 0.04000 651.3 0.0015355 6 0.02778 486.3 0.0020562 2 Slope: -0.0028304 R from slope: 0.0028304 No y-intercept: 0.0017945 R from y-intercept: 0.0017945 3 3 0.11111 845.3 0.0011830 4 0.06250 778.2 0.0012850 5 0.04000 657.1 0.0015218 1 6 0.02778 651.3 0.0015355 7 0.02041 486.3 0.0020562 2 Slope: -0.0074489 R from slope: 0.0074489 Yes y-intercept: 0.0019063 R from y-intercept: 0.0076252 3 4 0.062500 845.3 0.00118297 5 0.040000 778.2 0.00128497 6 0.027778 657.1 0.00152184 1 7 0.020408 651.3 0.00153551 8 0.015625 486.3 0.00205622 2 Slope: -0.015004 R from slope: 0.015004 No y-intercept: 0.002015 R from y-intercept: 0.018135 3 7.537E+06 1.906E+06 1 B: Ionization Energy and Energy Levels h (Planck's const) c (speed of light) IE(per atom) 6.626E-34 2.998E+08 3.786E-37 Js m/s J 2 IE(per atom) 3.786E-19 J 2 Avogadro's # 6.022E+23 IE (per mole) 4.494E+05 J/mole 2 The cel s under the h, c, and R headings below wil autofil from cel s B140, C140, and B133, respectively, so you just need to enter the formula in Column F to calculate En. n h c R 6.626E-34 2.998E+08 7.537E+06 1.495E-18 4 6.626E-34 2.998E+08 7.537E+06 9.340E-20 2 3 6.626E-34 2.998E+08 7.537E+06 1.662E-19 2 6.626E-34 2.998E+08 7.537E+06 3.739E-19 1 6.626E-34 2.998E+08 7.537E+06 1.495E-18 Part I . An Application of AES: Determination of Sodium DATA Molar mass of NaCl 58.44 g/mole Calculated mass of NaCl needed to make 100 mL of 0.100 M stock solution 0.5844 g Actual mass of NaCl weighed out 0.5840 g Actual molarity of stock NaCl solution prepared 5.8400 M Volume of 0.100 M stock NaCl solution for preparing 100 mL of each standard Desired mL of 0. 1M NaCl Standard Final [NaCl] (M) needed 1 0.0010 1 mL 2 0.0008 .8 mL 3 0.0006 .6 mL 4 0.0004 .4 mL 5 0.0002 .2 mL 1 Table 5: Flame Photometer Data Sample Intensity Standard 1 0.00100 5.40 100 Standard 2 0.00080 4.40 79 Standard 3 0.00060 3.30 63 1 Standard 4 0.00040 2.20 42 Standard 5 0.00020 1.10 57 Table 5 (continued) Sample Dilution Factor Intensity Gatorade 0.021829 25 85 Coca Cola 0.00035365 2.5 40 Site #1, 8.5 m depth 0.00056220 1 66 Site #1, 9.5 m depth 0.001128 2 66 Site #1, 10.5 m depth 0.007430 10 77 Site #1, 11.5 m depth 0.019024 100 43 Seawater 0.42731 400 97 DATA ANALYSIS 2 slope 61500 y-intercept 31.30 What percent of the labeled value is the measured value? 119 mg/8 fl. oz, sports drink 110 8 % measured vs labeled values 2 2 mg/8 fl. oz. for the cola drink 35 94 % measured vs labeled values 3 Freshwater samples as a function of depth: Depth (m) Intensity Dilution Factor Concentration (M) 8.5 66 1 0.00056220 9.5 66 2 0.001128 1 10.5 77 10 0.007430 11.5 43 100 0.019024 2 At the deepest point, what is the ratio of Seawater to Freshwater? What about the most shal ow point? Dilution Factor Intensity Concentration (M) Seawater 400 97 0.42731 Dilution Factor = [Na Seawater]/[Na Freshwater, deepest point or most shal ow point] deepest 22.5 most shal ow 76 2 3 RESULTS AND DISCUSSION 2 2 2 2 2 1 60 λ (nm) (descending order) Table 2. Hypothesis #1; nf = 1; ni = 2, 3, 4, 5, 6 ni values 1/ni 2 λ (nm) 1/ λ nm-1 nm-1 Is nf=1?
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/03/2012 for the course CHEM 152 taught by Professor Chiu during the Fall '08 term at University of Washington.

Ask a homework question - tutors are online