Ch.3 - Experimental ErrorWorksheetSee all chapters
 Ch.1 - Chemical Measurements 2hrs & 10mins 0% complete Worksheet Ch.2 - Tools of the Trade 1hr & 26mins 0% complete Worksheet Ch.3 - Experimental Error 1hr & 51mins 0% complete Worksheet Ch.4 + 5 - Statistics, Quality Assurance and Calibration Methods 2hrs & 1min 0% complete Worksheet Ch.6 - Chemical Equilibrium 3hrs & 43mins 0% complete Worksheet Ch.7 - Activity and the Systematic Treatment of Equilibrium 1hr & 1min 0% complete Worksheet Ch.8 - Monoprotic Acid-Base Equilibria 1hr & 52mins 0% complete Worksheet Ch.9 - Polyprotic Acid-Base Equilibria 2hrs & 16mins 0% complete Worksheet Ch.10 - Acid-Base Titrations 2hrs & 22mins 0% complete Worksheet Ch.11 - EDTA Titrations 1hr & 37mins 0% complete Worksheet Ch.12 - Advanced Topics in Equilibrium 1hr & 18mins 0% complete Worksheet Ch.13 - Fundamentals of Electrochemistry 2hrs & 27mins 0% complete Worksheet Ch.14 - Electrodes and Potentiometry 55mins 0% complete Worksheet Ch.15 - Redox Titrations 1hr & 14mins 0% complete Worksheet Ch.16 - Electroanalytical Techniques 1hr & 23mins 0% complete Worksheet Ch.17 - Fundamentals of Spectrophotometry 55mins 0% complete Worksheet BONUS: Chemical Kinetics Not available yet

All calculations are associated with some level of uncertainty which we define as its error

###### Types of Errors

Concept #1: Error can be categorized as either systematic or random

Example #1: A uncalibrated pipet is used in the titration of 25 mL of 0.250 M KMnO4 with 50.0 mL of HNO3. If the pipet delivers 23.120 +/- 0.02 mL what can be said about the possible error(s) observed?

Example #2: State whether the errors are random or systematic for each of the following:

a)  The analytical measuring pipet in the lab consistently delivers 25.0   0.03 mL.

b)  I weigh an analyte sample 4 times and obtain the following numbers: 1.110, 1.392, 1.040 and 1.850.