Titration

We followed up our work yesterday with the Lesson 89 Titration Lab.  Students received the Pre-Lab 89 Titration which we read through as a class.  Students then took a few minutes to complete Pre-Lab assignment questions 1-4 which we briefly discussed.  Students assembled into groups of 4 and worked through the lab.  A picture of one group’s neutralized tubes is shown below, followed by results for periods 2 and 3, as well as combined results.

 Period 2 Number of drops of NaOH
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 20 10 10 10 11 14 13
HCl Solution B 20 25 20 19 18 18 20
HCl Solution C 60 56 61 62 56 69 61
 Period 3 Number of drops of NaOH
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 14 15 12 14 19 9 14
HCl Solution B 25 27 23 18 27 27 25
HCl Solution C 54 60 80 73 75 63 68
 Combined Number of drops of NaOH
Period 2 Period 3
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 20 10 10 10 11 14 14 15 12 14 19 9 13
HCl Solution B 20 25 20 19 18 18 25 27 23 18 27 27 22
HCl Solution C 60 56 61 62 56 69 54 60 80 73 75 63 64

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