Could colors other than red be used? Safranin is the current counterstain being used. Other colors have been used in the past, such as a yellow color. 4. What is the advantage of the Gram stain over a simple stain such as methylene blue?
Post-Lab Questions: 1. Restate your hypothesis. Was it confirmed or denied? How do you know? If I put a mixture of potting soil and oil/vinegar/laundry detergent it will make four different types of dirty water.
Armadillidum vulgare: Light vs. Dark Environments By:Mya Davidson Abstract It is hypothesized that an isopod would prefer a dark environment rather than a light environment based on its natural habitat of soil. For the light vs. dark experiment, a container had 5 isopods on the light side and 5 isopods on the dark side. A study was taken for 5 minutes where every thirty seconds the number of isopods in each dish was counted. The results showed that isopods, like its natural habitats, preferred dark places.
In Exercise 4A: Plant Pigment Chromatography, the experiment was demonstrated by the teacher. We needed a 50-ml graduated cylinder with 1 cm of solvent in the bottom. One piece of filter paper needs to cut, so that it touches the solvent. Cut the end to a point and draw a pencil line 1.5 cm above the point. A coin needs to be used to extract pigments from the spinach leaf cells.
The test tube that showed signs of change was the test tube that contained I2 & H, which turned dark red and had some strong odor and did dissolved. I think it would be a chemical change because it showed that it dissolved and had an odor to it. 5. Was the reaction in Test 2 a physical or chemical change? Why?
Skip questions B, C, D, E and F in the lab manual, and answer these instead: A. What is the average % acetic acid in your vinegar sample? Standard vinegar is 5% acetic acid.How does your result compare with the standard? G. A 5.0 mL sample of vinegar was titrated with 7.2 mL of 0.55 M NaOH(aq). If the density of the vinegar solution is 1.00 g/mL, what is the mass percent of acetic acid present?
This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil. Also it also demonstrates that iodine is the weakest oxidizing agent because the results show that iodide didn’t change much from the color that it showed in the mineral oil. In example 6 we have shown the activity series for the halogens used in this
To help your teacher know whom the essay came from, save the file as: GEN1 S2 COMP 6.11 Research Paper First Draft_FIRST INITIAL_LAST NAME.doc Example: GEN1 S2 COMP 6.11 Research Paper First Draft_M_Smith.doc Type your paper in the document you create. When you are ready, turn in your draft to your teacher. • The recommended length requirement for this paper is 3–6 pages (900–1,800 words),
2. To test an unknown solution for starch, you would need to create a standard curve graph, find the slope and absorbance of the unknown, and plug it into Beer’s Law equation. Further into detail, you will need five standards containing .1,.2,.3,.4,.5, concentrates of starch put into five different test tubes. You will also need a test tube for the unknown, and a
5 .For part III, Average was needed to be found after Find the Mass/A of each all 5 disk. To do that Add all the values in Table 3 and divide them by 5. 6 .For Part III, Percent difference between the average value and the slope of the derivative diameter graph was found by doing this: ((slope of the derivative vs. diameter graph- average)/slope of derivative vs. diameter graph)*100 =67.9% VII. Analysis Questions/Answers 1. The Slope in Part I represents π 2.