CHEMISTRY 231

Spring, 2013 Homework Set 1

Complete for quiz on Feb. 6 Feb. 11

 

1.  Download the file on the Chem 231 website labeled filterHW.txt. (this gives the time in minutes and the signal in fluorescence units) and transfer to an Excel File.  Print a table from Excel showing two columns collected over the first 30 s period.

 

2.  Make a plot of the raw data from above and also data processed with a 2 s moving average over both the first 30 s and over the first 4 min.  This can be done by either using Excel's Plotting routines or by creating a 2 s moving average using a new column in Excel.

 

3.  Given the following HPLC data, determine the concentration of X in an unknown and the 95% uncertainty in X.

Calibration Data......................................................... Unknown Data

Levoglucosan conc Levoglucosan Area Levoglucosan conc Levoglucosan Area
(ug/mL)   (ug/mL)  
0.5 469.11 Unknown 2276.40
1 826.57    
2 1578.66    
5 3973.85    
10 8043.47