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Zn2+ standard
solution: Calculate the molar concentration of your Zn2+ standard solution (to
4 significant figures).
As we know that;
EDTA solution:
Calculate the concentration of the EDTA based on the titrations of the Zn2+ standard mixture
Also calculate the average, standard deviation, and
coefficient of variation (CV) of the concentration. The average, standard deviation,
and CV should be based on at least three runs.
|
Start time |
End |
Titration EDTA |
|
1.9 |
10.8 |
8.9 |
|
11.9 |
19.1 |
7.2 |
|
19.1 |
28.3 |
9.2 |
|
28.3 |
38.0 |
9.7 |
3. Sample runs:
a. Based on data from your sample runs (at least three runs
– you may eliminate the preliminary run), calculate the amount of zinc in the
cold lozenges.
b. Calculate the average, standard deviation, and CV of the
amounts of Zn.
|
Start |
Final |
titration |
|
23.7 |
48.7 |
25 |
|
0 |
27.00 |
27 |
|
28.4 |
50 |
21.6 |
|
t-Test: Paired Two Sample for Means |
||
|
|
Start |
Final |
|
Mean |
17.36667 |
41.9 |
|
Variance |
231.7233 |
166.93 |
|
Observations |
3 |
3 |
|
Pearson Correlation |
0.994527 |
|
|
Hypothesized Mean Difference |
0 |
|
|
df |
2 |
|
|
t Stat |
-15.5647 |
|
|
P(T<=t) one-tail |
0.002051 |
|
|
t Critical one-tail |
2.919986 |
|
|
P(T<=t) two-tail |
0.004102 |
|
|
t Critical two-tail |
4.302653 |
|
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