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Aim: To measure the mass of several different volumes of water and ice and use these to calculate their densities.
Equipment:
Electronic balance
Water
Ice cubes
Measuring cylinder
100mL beaker
Risk Assessment:
Hazard | Control |
Use of glass instruments - careless usage may lead to breakage | Care |
Part A: The density of water
Method:
The mass of the empty measuring cylinder was recorded using the electronic balance.
Water was added to the measuring cylinder using the 100mL beaker.
The combined mass of the measuring cylinder and water was recorded.
The mass of the water and the volume of the water was calculated using the difference between the above values (Combined mass of water and measuring cylinder - mass of measuring cylinder).
This procedure was repeated another 4 (reliability).
Results:
Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | |
Mass of 100mL measuring cylinder (g) | 134 | 134 | 134 | 134 | 134 |
Mass of water + cylinder (g) | 154 | 164 | 174 | 184 | 194 |
Mass of water (g) | 20 | 30 | 40 | 50 | 60 |
Volume of water (ml) | 20 | 30 | 40 | 50 | 60 |
Average Density calculated as 1 g/mL.
Class results:
Group number | Density calculated |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
Questions:
How did your value compare with those of the rest of the class? The value was consistent throughout the class.
Suggest possible reasons for variations between groups. There was no variation - as seen in the above table.
***************************************************Part B: The Density of Ice
Method:
The mass of an ice cube was measured using the electronic balance.
The ice cube was submerged in a measuring cylinder filled with water up to the 40mL line.
The amount of water that was displaced by the ice cube was recorded (this is equal to the volume of the...