2. The stirring furthered the reaction so it changed more towards blue as it was mixed.…
The crude acetaminophen was expected to be dark in color. This was due to the fact that the impurities were formed from oxidation of the starting phenol. The intensity of this was enough to impart color to the crude acetaminophen.…
What might you have used in the above experiment in order to see a visible color change in the solution? At what pH would the solution have been neutral?…
What does the color change in #3 indicate? Water and IKI was in jar and the iodine caused the color change of the water.…
1. No, the Starch did not. Because once we added Iodine to the Beaker the color did not change.…
The purpose of this test is to see what colors are in certain colors. We use chromatography to separate them/…
We would use the color chart to determine the amount of color change. The problems we had during this experiment was that the pipette, beakers,…
For this experiment the water type was brown and it had a mixture to show for it. For each experiment was not the same. When I did the tab water it had the color of a dark brown but it had this smell that smelled like dirt. When I did the one with the water with the oil in it the color was a light brown. This smell had the same smell as the tab water. The color of the experiment that was the water and vinegar the color was like a grey color. For this one it had a better clear color. For the last experiment the one with the soap this color had a darkest brown. I believed that the tab water that…
The purpose of this experiment is to observe the characteristic flame test colors of different .... Answers 1'0 Post-Lab Questions (Student answers will vary.) 1.…
D.|HCl + blue dye|A5|The mixture also turned green instantly. Under white paper it is a nice emerald color and slightly darker under black paper. |…
White tile: The tile was used to be able to observe the colour change of the solution in the conical flask better. By placing the white tile it allowed us to see the colour change more easily and quickly therefore increasing our chances of closing the burette tap on time and giving us closer and possibly more accurate results. If non clear paper was used or no paper at all, the colour change of the solution would not have been spotted as quickly therefore increasing the time taken to close the burette tap to stop sodium hydroxide being added to the vinegar solution. The increase of sodium hydroxide solution would mean that the results obtained would not be the accurate or close to the accurate value.…
The sun emits harmful ultraviolet rays. Excessive exposure to harmful sun rays accelerates the melanin production in the body and leads to darkening of the exposed skin. This causes the skin to tan which may even lead to other serious skin problems like acne, pimples, fine lines, wrinkles, skin burn, premature aging, and hyper-pigmentation and dark spots. Tanning usually makes the skin look dull and lifeless. There are several chemical cosmetic products that can be used to get rid of skin tan. However, the chemicals may not be good for the skin and may harm the skin in different ways and so it is better to use natural anti-tan methods and remedies to get rid of tan.…
2. After the nails were allowed to react, did the solution change color? What was…
Prior to embarking on laboratory exercises, students need instruction on Health and Safety procedures. Learners would watch a video clip about working with dangerous chemicals and be given informative hand-outs, which would also be sent to students via email. Students would then watch a demonstration on how to accurately measure chemicals, make up dyestuffs, monitor development time and colour grade results. Students then follow a written recipe themselves and assess their…
The onion is any of a variety of plants in the genus Allium, specifically Allium cepa. Allium cepa is also known as the "garden onion" or "bulb" onion. Above ground, the onion shows only a single vertical shoot; the bulb grows underground, and is used for energy storage, leading to the possibility of confusion with a tuber, which it is not.[1] It is a close relative to garlic.…