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7. Calculate the percent deviation between the trials.
% deviation=(highest molarity - lowest molarity)/average molrity *100
8. If the % deviation is greater than 5%, repeat the titration process.
Data:
| Trial 1 |
Trial 2 |
Trial 3 |
Trial 4 |
Trial 5 |
|
| KHP used |
2.00g |
2.00g |
2.00g |
2.00g |
2.00g |
| Initial NaOH |
0.20mL |
10.00mL |
19.70mL |
29.4mL |
39.15mL |
| Final NaOH |
10.00mL |
19.70mL |
29.4mL |
39.15mL |
48.85mL |
Observations:
First trial turned a dark pink after about 10mL of NaOH. Way too dark. About a drop too much of NaOH. Trial 2 turned a dark pink, not as dark as trial 1. Trial 3 was similar to trial 2, same color and same amount of NaOH used. Magic numer seems to be 9.7mL when it turns pink. We lost a little bit of the KHP for the 4th trial. Trial 4 got a very very faint pink color. Even though we lost
some KHP, it looks near perfect titration. Trial 4 looked clear until help against white paper. Trial 5 was a dark pink, though better than 1, 2, and 3. 4th trial was the best out of the 5.
Trial 4
