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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