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Chloe Marchant

on 15 December 2013

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Transcript of Crystals

Salt and Vinegar Crystals by Chloe Marchant
By: Olivia Lawler, Chloe Marchant,
and Brandon Masa

Problem Statement: Between a series of different types of crystals, which one will grow the most in ten days?
Hypothesis: If we test three types of crystals then the baking soda crystals will grow the most because carbon dioxide gas will be evolved with the baking soda.
Background Information

Salt and vinegar crystals are formed from ionically attracted elements. These elements are known as salts. An ionic bond is formed from elements that are undergoing attraction based on charges.
In the experiment you won't see any reaction at all. This is because the salt never decomposes/separates, it just dissolves. The liquid eventually will dry up leaving behind large crystals of salt
Helmentsine, Anne. "Salt and Vinegar Crystals." About.com. Date Unknown.
Michelle & Karen. "Salt and Vinegar Crystals." Layers of Learning.com. Date Unknown.
Godfrey, Donna. "Salt and Vinegar Crystals." Easy Fun School. Date Unknown.
1 cup of hot water
1 color of food coloring
1/4 cup of salt
2 teaspoons of vinegar
1 sponge
1 shallow dish
Manipulated Variables: salt, vinegar, and water
Responding Variables: crystals and solution
Variables Held Constant: sponge, sunlight, and dish
1. Create solution
2. Put food coloring on sponge
3. pour solution on sponge allowing it to overflow slightly
4. Set dish in a sunny/warm and where air circulated
5. All left over solution as poured solution starts to evaporate (optional)
6. When finished you can keep crystals or throw them away, wash dish regularly and pour left over solution down the drain

The end results were that the crystals barely formed. The crystals that did form, though, were little and look like cotton. Also none of the crystals took the color of the red food coloring
I did not get the results that I wanted. The crystals grew in a safe environment with no disturbances. I tested my crystals growth two ties and results remained constant. So crystals didn't grow to the greatest growth needed to have the most growth.
The purpose of this project was to determine which crystals has the most growth within a period of time. I hypothesized that the baking soda crystals would grow the most.
My partners and I all tested our own crystals at home. We recorded the data as the crystals progressed. Then we brought information collected to each other to get end results.
Results show that the baking soda crystals grew the most. My hypothesis was therefore correct. To improve this study, we could have done the experiments at one house.
Having tested three different types of crystals, salt, baking soda, and salt and vinegar, for the most growth, we now know that baking soda crystals grow the most in ten days. With knowing this information we now know that if we need crystals with the most groth that we need to grow baking soda crystals. but if weneed crystals with little growth then we know to grow salt and vinegar crystals. But if we need crystals with in between growth then we know to grow salt crystals.
Chloe's Application
Full transcript