2. Methods

Equipment list

1. Glass beakers (max. capacity; 1000ml) x1
2. Glass rod [stirrer]                                  x1
3. Gelatin powder [different mass, 1:3]1+3=4
4. Weighting machine                               x1
5. 50g weights                                          x12
6. 300g weight                                        x1
7. Refrigerator                                        x1
8. plastic containers [jelly containers]       x6


Procedures:

  1. Pour 10g of gelatin powder into the beaker.
  2. Add 150ml of water into the beaker.
  3. Stir the mixture 70 times.
  4. Pour the mixture into a container.
  5. Wash the beaker.
  6. Pour 15g of gelatin powder into the clean beaker.
  7. Add 150ml of water into the beaker.
  8. Stir the mixture 70 times.
  9. Pour the mixture into another container.
  10. Wash the beaker.
  11. Pour 20g of gelatin powder into the clean beaker.
  12. Add 150ml of water into the beaker.
  13. Stir the mixture 70 times.
  14. Pour the mixture into another container.
  15. Wash the beaker.
  16. Pour 10g of gelatin powder into the clean beaker.
  17. Add 150ml of water into the beaker.
  18. Stir the mixture 70 times.
  19. Pour the mixture into another container.
  20. Wash the beaker.
  21. Pour 10g of gelatin powder into the clean beaker.
  22. Add 150ml of water into the beaker.
  23. Stir the mixture 85 times.
  24. Pour the mixture into another container.
  25. Wash the beaker.
  26. Pour 10g of gelatin powder into the clean beaker.
  27. Add 150ml of water into the beaker.
  28. Stir the mixture 100 times.
  29. Pour the mixture into another container.
  30. Wash the beaker.
  31. Put all containers into the refrigerator.
  32. Wait for the gelatin to set.
  33. When they have set, take them out of the refrigerator.
  34. Place 50g weights on the surface of the gelatin gradually until the gelatin cracks. Only use the 300g weight should the gelatin resist the 600g of weights on it.
  35. Calculate the total mass of weights on the gelatin when it cracks. That will be referred to as the crushing weight, which indicates the strength of the gelatin.

Risk and Safety: Identify any potential risks and safety precautions to be taken.

1.   People may consume the gelatin by accident. Since we are using a fridge which  is also used for bacteria, consuming the gelatin could be harmful. Our solution to handling this risk is write "DO NOT CONSUME" on the containers we will be using.

2.    The powder for the gelatin is flammable, which could start fires if we are not careful. Our solution for this is to keep the powder away from any open/naked flames or anything that can create sparks.

Data Analysis: Describe the procedures you will use to analyze the data/results that answer research questions or hypotheses

1.    Create a table with the crushing weights of each container of gelatin for each factor.
2.    Using the crushing weights of each container of gelatin from the table, plot two graphs for each factor stating the increase or decrease of the crushing weights.
3.    From the graph, we can find out the best conditions to create the strongest gelatin.

No comments:

Post a Comment