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*You can add a few drops of food coloring to the pot after you stir in the sugar to make your project more colorful.
*Place a piece of clean, white paper or a paper towel on top of the jar the keep dust out.
*While a ratio of 4 cups of granulated sugar to 2 cups of distilled water is often adequate to effectively complete the experiment, sugar will dissolve at different rates depending on how warm the environment is. Use the 4:2 ratio as a guideline for the experiment.
*Distilled water is preferred for this experiment. Tap water may contain elements, such as iron, copper or fluoride, that can effect your results.
A little bit of sugar crystals have grown on the tip of my 7 Up chop stick, but the distilled water and tap water still hasn't had any big sign of changes for some reason. Why did I say no big changes? That is because there are white things ( I do not know what it is) floating at the top of the jars, some are attaching to the chop stick.
• 3 glass jars (old spaghetti jars work great)
• Dish soap
• Cotton string (chop sticks works just as well)
• Distilled Water
• Tap Water
• 7 Up
• 3 pencils
• Scissors (I did not use it in this case)
• Small pot to boil water (has to be very clean
• 4 cups of sugar
• Stirring spoon
• Food coloring (optional)
• a scale of grams
• a paper ruler with centimeters
* You can ask for help if you can not handle boiling hot water
There are no big changes for the sugar liquids except the sugary 7 Up got thicker and thicker. It had started to stick to the chop stick.
During these days, a lot of sugar crystals have grown at the bottom of the 7 Up glass jar. But there are no sign of changes in the other bottles.
http://en.wikipedia.org/wiki/7_Up
The printed sheet Mrs. Plamondon gave me
My hypothesis was correct. Because of the other added chemicals such as citric acid, and sodium citrate, calcium disodium EDTA... The sugary 7 Up had a lot of sugar crystals grew in it. Distilled water and tap water did not work well for me. I tried twice, but only a little bit of sugar crystal grew. Tap water worked better than distilled water and I guess it is because of the minerals in it, and I am correct. When I weighed it, I put a chop stick on the other side, then weighed or I will be weighing the chop stick as a part of the crystals. When I was weighing the Distilled and Tap water, the scale did not go equally and I had to add weights, that is why the length on the graph is empty, I do not know where it grew. For 7 Up, on the other hand, it grew so much crystals at the bottom that I had to use the chopstick to get them out. These are my result for my sugar crystal experiment about how different kinds of liquids ( 7 Up, Distilled water, and Tap water) affect the growth ( length, weight) of sugar crystals.
After two weeks, the length of the part where the sugar crystals grew in the 7 Up water are 7 centimeters. The weight is 76 grams.
I tried twice but the distilled water and tap water only grew crystals so little that you can not see it with your eyes. I only knew that is have a little bit of sugar crystals because I can weight it.
I predict sugary 7Up would make the best sugar crystals because 7Up already have different sorts of things that helps the growth of sugar crystals in it. I also predict sugary distilled water and sugary tap water wouldn’t get a lot of sugar crystals because it is just plain water, which wouldn’t help the growth of sugar crystals.
Each day, I need to look at the changes of the sugary water to see how the sugar crystal are growing. After two weeks, I will measure the weight of the sugar crystals using a scale and the length of the part the grew crystals using a paper ruler.
Sugar crystals grow because the sugar is supersaturated which means that the water contain too much sugar in it. It sometimes need a “seed” for the extra sugar to grow on. The chemical formula for sugar is C6H12O6. 6 Carbon, 12 Hydrogen, and 6 Oxygen molecules make one glucose molecule.
Tap water sometimes contain minerals such as iron,copper,etc. Distilled water should contain nothing but H2O (water). 7 UP is mainly made of carbonated water, high fructose corn syrup and/or sugar, citric acid, natural lemon and lime flavors, sodium citrate, calcium disodium EDTA (to Protect Flavor). These things may affect the growth of sugar crystals.
How does differ kinds of liquid (tap water, distilled water, and 7 Up) effect the growth (weight, length) of sugar crystals?
1. Wash a glass jar with warm, soapy water. Any food residue can affect the outcome of the experiment, clean the glass jar thoroughly.
2. Tie a piece of cotton string around the center of a pencil. Rest the Pencil on top of the lid of the jar, allowing the cotton string to fall freely into the center of the jar.
3. Cut the string with scissors so that it hangs approximately 1/2 inch from the bottom of the jar.
4. Bring two cups of tap water to a boil in a small saucepan, then remove it from the heat.
5. Slowly add--spoonful by spoonful--the granulated sugar. Use a spoon to
thoroughly mix in each spoonful, until it dissolves, before adding the next. Continue adding sugar until the water becomes so saturated, no more sugar will dissolve in it.
6. Remove the string from the glass jar and pour in the sugar solution. Rest the pencil on top of the jar, allowing the string to dangle in the sugary liquid.
7. Repeat the steps with the 7Up and distilled water.
8. Set the glass jars in an area where it will remain undisturbed. Check the jar every day to see how the sugar crystal have grown on the string.