Chemistry ISA preparation Essay Example

Hypothesis: I predict that a change in the mass of ammonium nitrate will affect the temperature change.
Method:
1. Set equipment diagram
2. Measure 30cm^3 water
3. Pour into polystyrene cup
4. Measure temperature
5. Weigh 1g Ammonium Nitrate
6. Put in cup
7. Hold and swirl beaker
8. Record min. temp.
9. Dispose solution separate beaker
10. Rinse cup
11. Repeat for 2g, 3g, 4g, 5g
Equipment:
Balance
Ammonium Nitrate powder
Distilled water
Spatula
Glass beaker
30cm^3 Measuring cylinder
Weighing boat
Thermometer 0C
Polystyrene cup and lid with hole
Risk Assessment:
Irritant to skin and eyes – wear gloves and goggles and labcoat
Heating/Ignition source may cause violent combustion/explosion – keep away from naked flames
Context
We can use the results from this experiment to find out the optimum mass of ammonium nitrate for use in cool packs. This reaction is endothermic; we may be able to use this for other cooling purposes in the future. (?)Hypothesis: I predict that a change in the mass of ammonium nitrate will affect the temperature change.
Method:
12. Set equipment diagram
13. Measure 30cm^3 water
14. Pour into polystyrene cup
15. Measure temperature
16. Weigh 1g Ammonium Nitrate
17. Put in cup
18. Hold and swirl beaker
19. Record min. temp.
20. Dispose solution separate beaker
21. Rinse cup
22. Repeat for 2g, 3g, 4g, 5g
Equipment:
Balance
Ammonium Nitrate powder
Distilled water
Spatula
Glass beaker
30cm^3 Measuring cylinder
Weighing boat
Thermometer 0C
Polystyrene cup and lid with hole
Risk Assessment:
Irritant to skin and eyes – wear gloves and goggles and labcoat
Heating/Ignition source may cause violent combustion/explosion – keep away from naked flames
Context
We can use the results from this experiment to find out the optimum mass of ammonium nitrate for use in cool packs. This reaction is endothermic; we may be able to use this for other cooling purposes in the future. (?)
Hypothesis: I predict