IV. Laboratory Report: (Parts 1,4,5 are typed.) 1. Title page including the average calculated value of molarity of NaOH and the precision of the titrations, as well as your section number and date. 2. Signed prelab assignment torn from manual. 3. Photocopies of laboratory notebook pages containing data. 4. Prepare a table summarizing each titration, including average molarity and relative standard deviation. If you do more than three titrations, show all the data and include your relative standard deviation for all titrations. Title: Give table a descriptive title Titration MNaOH (mol/L) Maverage NaOH 1 3 Precision: If you do more than three titrations, show all the data and indicate which ones were used to calculate your average molarity. Show all calculations for this table (neatly) on additional paper and attach. 5. Error Analysis Questions: A detailed discussion on how to approach error analysis questions was covered in the introduction to this lab manual. Please go back and read that section again. On the following pages are questions that ask "Will the calculated Molarity of NaOH be too HIGH or too LOW or UNAFFECTED if the following errors happen?". An example of how to approach error analysis of this type is shown below: The weight of KHP written in the data book is higher than was actually used. Since moles of NaOH is calculated from the recorded weight of KHP, this gives a high value of moles of NaOH. Also since we actually titrate less KHP we use less volume of NaOH than what you expect. Our calculation becomes: high moles Molarity of NaOH Molarity will be too HIGH low volume
IV. Laboratory Report: (Parts 1,4,5 are typed.) 1. Title page including the average calculated value of molarity of NaOH and the precision of the titrations, as well as your section number and date. 2. Signed prelab assignment torn from manual. 3. Photocopies of laboratory notebook pages containing data. 4. Prepare a table summarizing each titration, including average molarity and relative standard deviation. If you do more than three titrations, show all the data and include your relative standard deviation for all titrations. Title: Give table a descriptive title Titration MNaOH (mol/L) Maverage NaOH 1 3 Precision: If you do more than three titrations, show all the data and indicate which ones were used to calculate your average molarity. Show all calculations for this table (neatly) on additional paper and attach. 5. Error Analysis Questions: A detailed discussion on how to approach error analysis questions was covered in the introduction to this lab manual. Please go back and read that section again. On the following pages are questions that ask "Will the calculated Molarity of NaOH be too HIGH or too LOW or UNAFFECTED if the following errors happen?". An example of how to approach error analysis of this type is shown below: The weight of KHP written in the data book is higher than was actually used. Since moles of NaOH is calculated from the recorded weight of KHP, this gives a high value of moles of NaOH. Also since we actually titrate less KHP we use less volume of NaOH than what you expect. Our calculation becomes: high moles Molarity of NaOH Molarity will be too HIGH low volume
Chapter1: Matter, Measurements, And Calculations
Section: Chapter Questions
Problem 1.79E
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