Potassium Nitrate Experiment

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Materials: 5 ft length of schedule 40 PVC pipe 10 inch length 3/4 inch wooden dowel 1 container of potassium nitrate based stump remover 1 bag of bentonite clay based kitty litter 1 bag of powdered sugar 1 roll duct tape Model rocket igniters or fuse 7/32 drill bit Hypothesis: The best ratio for potassium nitrate to powdered sugar is 1 to 3 because Grant Thompson who has experimented with the best ratio of powdered sugar to potassium nitrate has stated that “the 1 to 3 ratio is best for creating the most amount of thrust from your rocket.” This paired with a rounded fin design will get the most distance from our rocket. The rounded fin design will block less air and stabilize the rocket. Purpose: We are doing this this experiment to …show more content…

Cut down the dowel to six inches and mark it at 1-7/16 inches, 2-1/4 inches, and 3 inches. Create three different mixtures of potassium nitrate and powdered sugar; one that is three parts potassium nitrate to one part powdered sugar, one that is two parts potassium nitrate to two parts powdered sugar, and three parts powdered sugar to one part potassium nitrate. Each part is 25 grams. Take the bentonite clay and grind it in a blender until it is at a powdery consistency. Fill a pvc section with one tablespoon of clay (make sure the pvc is on a flat surface). Take the wooden dowel and put it inside the pvc section. Hit the dowel with a mallet 5-10 times until the clay forms a strong plug at the end of the pvc. Pour a mix into a length until it reaches the top of the pvc. slowly push the dowel until it stops allowing you to stick it in farther. The mix will compact. Pour out some of the mix if it goes higher than the second mark on the dowel. If it is below the mark add more white mix until it reaches the second mark on the dowel. Fill the other end with clay powder until you reach the third mark on your dowel. Make hole with a 7\32 drill bit until you reach the white powder at the other

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