Question

# a)sample weight net weight buret, initial buret, final net volume density,Xm d=Xm-<x> d^2 1 108.9125 6.2449...

 a)sample weight net weight buret, initial buret, final net volume density,Xm d=Xm- d^2 1 108.9125 6.2449 0.21 6.19 5.98 1.044 0.003 9.0x10^-6 2 114.7771 5.8649 6.19 12.09 5.90 0.9941 -0.0469 2.2x10^-3 3 121.4513 6.6742 12.09 18.42 6.33 1.054 0.013 1.7x10^-4 4 127.3443 5.893 18.42 24.19 5.77 1.021 -0.02 4.0x10^-4 5 135.6526 8.3083 24.19 32.12 7.93 1.048 0.007 4.9x10^-5 6 141.9447 6.2921 32.12 38.16 6.04 1.042 0.001 1.0x10^-6 7 147.6895 5.7448 38.16 44.13 5.97 0.9623 -0.0787 6.2x10^-3 8 154.5351 6.8456 44.13 50.00 5.87 1.166 0.125 1.6x10^-2

Standard Deviation; data was obtain during lab but im not sure if the rest calculations are correct (Xm, d=Xm-<x>, and d^2) I'm also having a hard time understanding the concept. please answer the following questions and explain, Thank you. a)show your calculations of the standard deviation, s, from d^2. b) reported value and range:_________ % NaCl from handbook______ pg and year______ c)do you have any values in your table for the density of the salt solution that lies outside the range (<Xm>+_ 2s)?. if so list them d)recalculate <Xm>, omitting values that lie outside the range ( this is the density value you should use to find your experimental %NaCl.)

Following is the solution/Answer to Part-a) of the above problem:

Standard Deviation (i.e. of d2) = 6.0 10-3 = 0.006

Following is the Calculation (for Part-a) ) , in image format.

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