Dalton

Title Temperature Crystals

Introduction I did this project because I wanted to see the ideal temperature for crystal growing. Question Does the temperature of the water effect the growth of crystals? hypothesis I think the colder water will grow faster because crystals grow in a colder environment. My Method I measured my alum and i got 1/2 a cup of hot tap water and then slowly poured in the alum slowly and stirred and until it stopped dissolving.Then waited for 6 days and got no sign of any crystals.

Materials
 * 1/2 c hot tap water
 * 2-1/2 T alum
 * nylon fishing line
 * pencil, ruler, or knife
 * 2 clean jars
 * spoon
 * coffee filter/paper towel

Results I didn't get crystals but they would of been in a shape of a octahedron Research By lowering the temperature of the solvent, you can reduce the solubility of the ions and it jump starts

Evaporation** Crystals formed by evaporation form due to the fact that there is decreasingly less solvent available for the ions to be dissolved in, therefore causing a state of metastable or supersaturation in which nucleation and crystal growth can occur.
 * Questions for further research


 * Adjust the pH:** This method is commonly used to obtain homogeneous nucleation and growth because we can control pH by various reactions. In doing this, we can effectually make the change as slow as we want and make it completely uniform throughout the solution. The crystals again form because the extent to which the ions are soluble decreases when the pH is changed in the right direction.

Bibliography Destro, James. "Crystal Formation." //Rensselaer Polytechnic Institute (RPI) :: Architecture, Business, Engineering, IT, Humanities, Science//. N.p., n.d. Web. 25 Jan. 2010. .

"Best Crystals for Beginners - Beginner Crystal Growing Projects." //Chemistry - Periodic Table, Chemistry Projects, and Chemistry Homework Help//. N.p., n.d. Web. 25 Jan. 2010. .