Space Sand Soda Experiment

For the final step, I repeated the experiment with a second

It wasn’t valid due to the improper lighting conditions in the room, the pen ink drying out, and sometimes the misstart of the stopwatch. The lighting is problematic because it irritates the termites, making them uncomfortable, and potentially causing them not pick up the scent of the pheromones and follow the lines. Over time the pen ink drys up causing the pheromone smell to fade away, making it hard for the termite to pick up the pheromones and traveling slower or less. Lastly, the stopwatch not being completely accurate can account for missing 2 seconds for the data, table, and graph. In conclusion, black and purple pens contain the scent pheromones, that attract termites, allowing them to follow the trail due to their

8. The Tubes were observed for a final 5 minutes, noting any color changes in the solutions.

The first step that needed to be done in this experiment was adding hydrochloric acid (HCl)

14 mL of 9 M H2SO4 was added to the separatory funnel and the mixture was shaken. The layers were given a small amount of time to separate. The remaining n-butyl alcohol was extracted by the H2SO4 solution therefore, there was only one organic top layer. The lower aqueous layer was drained and discarded. 14 mL of H2O was added to the separatory funnel. A stopper was placed on the separatory funnel and it was shaken while being vented occasionally. The layers separated and the lower layer which contained the n-butyl bromide was drained into a smaller beaker. The aqueous layer was then discarded after ensuring that the correct layer had been saved by completing the "water drop test" (adding a drop of water to the drained liquid and if the water dissolves, it confirms that it is an aqueous layer). The alkyl halide was then returned to the separatory funnel. 14 mL of saturated aqeous sodium bicarbonate was added a little at a time while the separatory funnel was being swirled. A stopper was placed on the funnel and it was shaken for 1 minute while being vented frequently to relieve any pressure that was being produced. The lower alkyl halide layer was drained into a dry Erlenmeyer flask and 1.0 g of anhydrous calcium chloride was added to dry the solution. A stopper was placed on the Erlenmeyer flask and the contents were swirled until the liquid was clear. For the distillation

The purpose of this experiment was to separate the component of three mixtures sand, sodium chloride and calcium carbonate then calculate the percentage by mass of each component recovered from the mixture. The other purpose of this experiment was to show us the students the concepts associated with physical and chemical properties of substances.

This experiment was done in order to understand both fractional distillations and gas chromatography. In addition, this experiment was done to separate and identify two liquids that made up an unknown mixture. Gas chromatography was used to figure out the ratio of these two liquids.

Because salt dissolves in water, we added water to the salt and sand mixture. Sand is insoluble in water making the sand not dissolve. The mixture containing of sand and salt water was then filtered with filter paper. The filter paper allowed the salt water to pass through because it is a liquid while not allowing sand to pass through because it is a solid. The salt water was then collected in a pre-weighed 250-mL (67.88 gram) beaker while the sand and filter paper was put in a pre-weighed (52.02 gram) 100-mL beaker. The water was then evaporated because we left both beakers to dry overnight.

Answer: Once the chromatogram has been completed and is ready to be measured and calculated, on the plate that was used to perform the chromatogram you should see where the red and blue have completely separated. The red food coloring dye should be lower on the plate than the blue food coloring dye.

Begin by labeling two sets of 7 different 1.5 ml tubes 0 thru 6. Obtain 1 more 1.5 ml tube and label it B for the blank. Obtain 1 sample of 15 μls from each of the serially di-luted tube concentrations and put it in its corresponding 1.5 ml tube. Now add 525 μl of media in each 1.5 ml tube, followed by 60μl of Alamar Blue in each tube. Close the lids of all the tubes and vortex for 5 seconds. In order to make the blank, add 180 μl of media and 20 μl of Alamar Blue in another 1.5ml tube.

A chemical change can be caused by combining two compounds, such as baking soda (NaHCO3) and vinegar (CH3COOH). The change that is taking place is because of the chemical property of reactivity. When these two compounds react CO2 is produced. In this experiment we wanted to see how much baking soda, added to 10mL of vinegar, would cause a film canister rocket to shoot the farthest. I predicted that 10mL of baking soda would shoot the farthest because it would be equal to the amount of vinegar in the canister. The independent variable in this experiment was the amount of baking soda and the dependent variable was how far the lid would shoot.

In this graph you can see the error bars (using standard dieviation) are overlaping at every point except at the outliner which was at 2.5% dye concentration with 20% azide. Note how all the solutions (control, 10% azide, 20% azide, and 30% azide) show

The next step was to place the strip of chromatography paper on a paper towel. Then dip a capillary tube into the plant pigment extract (spinach pigment extract) provided by the teacher. The tube will fill on its own. We applied the extract to the pencil line on the paper, blew the strip dry, and repeated it three to four times until the line on the paper is a dark

Empty and clean the test tubes and repeat steps 2-10 again for a second dataset.

Step 1 and 2 was repeated by using distilled water by replacing the test solution.