What is the average ratio in this chart?
Please show me the calculation too!
|
Sample |
1 |
2 |
3 |
Calculations for sample 1 |
|
Mass of aluminum dish |
1.24g |
1.26g |
1.24g |
- |
|
Mass of aluminum dish + Epsom salt |
1.70g |
1.94g |
1.80g |
- |
|
Epsom salt, original (hydrated) mass |
0.46g |
0.68g |
0.56g |
1.70g – 1.24g = 0.46g |
|
Mass of aluminum dish + Epsom salt after heating |
1.42g |
1.62g |
1.61g |
|
|
Epsom salt, heated (dehydrated) mass |
0.18g |
0.36g |
0.37g |
1.42g- 1.24g = 0.18g |
|
Mass of water |
0.28g |
0.32g |
0.19g |
0.46g – 0.18g = 0.28g |
|
Moles of magnesium sulfate |
0.0015mol |
0.0030mol |
0.0031mol |
0.18g x (1mol/120.37g)= 0.0015mol |
|
Moles of water |
0.016mol |
0.018mol |
0.011mol |
0.28g x (1mol/18.02g) = 0.016mol |
|
Ratio of moles water: moles of magnesium sulfate |
32:3 |
18:3 |
11:3.1 |
0.016 : 0.0015= 32:3 |
|
Average Ratio |
|
|
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