ST LAB - Adam Romman Partner: Steven Chen Surface Tension...

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Adam Romman Partner: Steven Chen Surface Tension Lab 6/8/2007 Data Analysis 1) n-but sample trial height conc water trial height 1 2.12 Q 1 1.68 1 2 3.13 0.109323303 2 1.31 3 3.08 3 1.57 1 2.47 2 2 2.53 0.145764404 NaCl sample trial height conc 3 2.41 1 1.37 1 2.53 1 2 0.99 1.6875 3 2 3.03 0.194352539 3 1.13 3 2.72 1 1.33 1 2.09 2 2 1.59 2.25 4 2 2.18 0.259136719 3 1.47 3 2.35 1 1.79 1 2.45 3 2 1.75 3 5 2 2.26 0.345515625 3 1.7 3 1.96 1 1.72 1 1.94 4 2 1.74 4 6 2 2.1 0.4606875 3 1.76 3 2.61 1 2.18 7 2 1.8 0.61425 3 1.94 1 1.99 8 2 1.94 0.819 3 1.96 n-but conc avg ht (cm) stand dev water avg ht (cm) stand dev 0.109 3.11 0.04 1.52 0.19 0.146 2.47 0.06 0.194 2.76 0.25 NaCl conc avg ht (cm) stand dev 0.259 2.21 0.13 1.688 1.16 0.19 0.346 2.22 0.25 2.250 1.46 0.13 0.461 2.22 0.35 3.000 1.75 0.05 0.614 1.97 0.19 4.000 1.74 0.02 0.819 1.96 0.03 2) n-but conc (M) NaCl conc (M)
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0.109 1.688 0.146 2.250 0.194 3.000 0.259 4.000 0.346 0.461 0.614 0.819 3) attached radius (cm) 0.095 This is several times higher than the literature value, so there may have been issues with the capillary tube. 4) n-but conc (M) suface tension (N/m) 0.109 0.146 0.146 0.116 0.194 0.130 0.259 0.104 0.346 0.105 0.461 0.104 0.614 0.093 0.819 0.093 5) n-but conc (M) ln conc surface conc (mol/m^2) surface conc (mol/cm^2) 0.109 -2.213 9.49E-06 9.49E-10 0.146 -1.926 9.49E-06 9.49E-10 slope 0.194 -1.638 9.49E-06 9.49E-10 -0.023212 0.259 -1.350 9.49E-06 9.49E-10 0.346 -1.063 9.49E-06 9.49E-10 0.461 -0.775 9.49E-06 9.49E-10 0.614 -0.487 9.49E-06 9.49E-10 0.819 -0.200 9.49E-06 9.49E-10 6) avogrado constant 6.02E+23 1 angstrom = 10^-10 m surface conc (molecules/angstrom^2) 0.0572 take inverse to get area (angstrom^2) / 1 molecule
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17.50 7) equation attached literature values for NaCl solution conc (M) density (g/cm^3) 0 0.9971 slope 0.037 0.1719 1.0045 intercept 0.999 0.346 1.0108 0.7015
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This note was uploaded on 09/07/2009 for the course CH N/a taught by Professor Genemcdonald during the Spring '09 term at University of Texas at Austin.

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ST LAB - Adam Romman Partner: Steven Chen Surface Tension...

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