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Question

Out of 7 degrees celcius (fridge), 22 degrees celcius (room temperature), 37 degrees celcius (body temperature) which temperature will produce the largest and purest borax crystals?

Hypothesis

How can you use this in the real world?

(n.d.). Retrieved from http://www.beyondpesticides.org/infoservices/pesticidefactsheets/leasttoxic/boricacid_borates_borax.php

Wikipedia (2012). Borax. [ONLINE] Available at: http://en.wikipedia.org/wiki/Borax#Toxicity. [Last Accessed 10/11/2013

Edited by Sandra Slutz, PhD, Science Buddies Fleur Ferguson, Scott Forman, Jamie Kleinberg, OSI Pharmaceuticals (2013). Crazy Crystal Creations: How to Grow the Best and the Largest Crystals . [ONLINE] Available at: http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p082.shtml#summary. [Last Accessed 10/11/2013]

The Engineering Toolbox (). Cooking Volume Converter - US and Metric Units. [ONLINE] Available at: http://www.engineeringtoolbox.com/cooking-volumes-d_398.html. [Last Accessed 10/11/2013].

Room temperature will produce the largest and purest crystals because the longer the solution cools the larger the crystals. Furthermore, when crystals form slowly they reject impurites.

In the real world you can use crystal formations to analyze things in nature which will help us understand synthetic complex structures

Borax Crystals

Sofia Bralich

Steven Ramirez

Conclusion

Materials

Water

Thermometer

String

Scissors

Popsicle sticks

Jars

Cooking pot

Sodium Tetraborate (Borax)

Tablespoon

Plastic Wrap

Heating Pad

Our hypothesis was that the 22 degrees celcius jar would produce the largest and purest crystals. We were incorrect. The 37 degrees celcius produced the largest and purest crystals. Although the 7 degrees celcius jar produces the most crystals these were not he largest or purest. This is because the borax crystals had time to form since the heating pad kept the moleculs moving.

Borax is a natural mineral which is made from the boron element and boric acid. Borax is used in many products such as detergents and cosmetics. Borax crystals form when the borax is dissolved in hot water and it cools. This is called recrystallization.

Steps

Data

1. Tie a piece of string to a each popsicle stick

2. Fill a pot with 900 milliters of water

3. Dissolve 180 mL of borax into the water

4. We boiled the solution

5. Pour the solution into the jars, until the jars are 3/4 full

6. Lay the popsicle sticks across the jars

7. Cover the jars with plastic wrap

8. Place one jar in the refrigerator, one on the counter, and one on a heating pad

9. Leave the jars alone for twenty-five hours while the crystals form, recording data at five hour intervals

10. After the crystals form remove them from the jars and compare the crystals

Pictures

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