White Before Your Eyes Experiment

The materials that were used/needed in this experiment were a penny, water, soap, rubbing alcohol, a pipet, and a beaker.

1. What type of macroscopic evidence for chemical change did you observe during this experiment? Give at least three different examples. (15 points) The main evidence of chemical change in this lab is the change in color, production of gas, and the production of precipitate.

In the last test, we had to test out a mystery powder (powder A, B, C), in its own separate test tube, in order to solve the Sherlock Holmes Mystery. Our group had powder C. When we mixed water in the mystery powder, it did not dissolve. When the litmus paper was put into the test tube it turned blue. When the vinegar was mixed it bubbled/foamed up. When we mixed the iodine solution, there was no reaction and the solution turned to a dark brown/black color. When we mixed in the baking soda there was no reaction and it turned to an even darker color.

In order to show you why these students believe the mystery mixture is a combinations of NaHCO3 & C6H8O7 I will need to show you the mixture’s chemical and physical properties. The NaHCO3 & C6H8O7 mixture is a bright white color, and has a slight airy smell. The claim also has a powdery white substance or the NaHCO3. It also has small white spheres, that resemble the mystery mixture’s, which is probably the C6H8O7. The students have also learned through experimentation that if you leave the

Matthew Frye Jacobson’s Whiteness of a Different Color offers innovative insight into the concept of “race” and the evolution of “whiteness” throughout American history. Jacobson focuses his analysis on the instability of racial identification over time and how race has been created and perceived throughout different stages of history. He states in his introduction that “one of the tasks before the historian is to discover which racial categories are useful to whom at a given moment, and why” (p.9) and while he is successful in some respects, his analysis is somewhat incomplete in providing a full scope of the power relations that created, altered and maintained racial identities in the United States. While Jacobson offers a detailed

I believe mystery powder 14 is powdered sugar (sucrose). I was first able to eliminate both of the known flours, the cornstarch and the baking powder with a vinegar solubility test because the powder immediately fizzed and, after being stirred with a toothpick, dissolved. The powders I was able to eliminate either did not bubble or did not dissolve into the vinegar. Noting the physical properties, that the powder was a bright, opaque white that formed small clumps, I predicted that the powder was powdered sugar. To confirm my prediction, I performed three other tests. The heat test was consistent was powdered sugar, resulting in streams of smoke, a sweet smell, and a caramelization of the powder. The sodium hydroxide (NaOH) test further support

In conclusion what makes Oobleck act like both a liquid and a solid? In your mind think that you can see the individual molecules of corn flour and water then think about how they might act when being pushed and pulled. The corn flour and water mixture will act like a solid and a liquid this type of mixture is an example of suspension. The particles stay undissolved in a liquid and corn flour molecules are dispersed into the water. If the cornstarch mixture is pinched, it causes the molecules to go closer together. The effect of the force traps the water between the flour molecules to form a solid shape. When you let go the pressure of your fingers the corn flour will be able to flow like liquid. Viscosity is the resistance for a liquid to

They ruled this combination out by comparing its physical and chemical properties to those of the mystery mixture. One of the differences between the mystery mixture and the mixture of MgSO4, C6H8O7, and NaHCO3 is during the chemical reaction. During the reaction of the mystery mixture the bubbles and only about one centimeter high. During the reaction of MgSO4, C6H8O7, and NaHCO3, the bubbles were approximately one inch tall. Another difference during the chemical reaction was the time that the two mixtures fizzed. The mystery mixture fizzed for about 3 minutes and 14 seconds. The combination of MgSO4, C6H8O7, and NaHCO3 fizzed for approximately 5 minutes and 47 seconds. Thirdly, the eighth-grade scientists decided to eliminate MgSO4, C6H8O7, and NaHCO3 as a possibility to be the mystery mixture because during the reaction the mystery mixture's temperature was 16.5oC at the end of the reaction. While the combination of MgSO4, C6H8O7, and NaHCO3 ended up at 17.6oC. Finally, the scientist knew that they could rule out the mixture of MgSO4, C6H8O7, and NaHCO3 is because they noticed that the chunks in the mystery mixture were not shiny, but very dull, and the lumps in the mix of MgSO4, C6H8O7, and NaHCO3

White privilege, ignorance, and blindness are not valid reasons for minimizing racial oppression or social injustice. The reach of white privilege is extensive yet rarely recognized by white individuals. Most individuals are not aware of their white privilege or the subtle "accommodations" that are afforded white individuals not shared by African Americans. White privilege affords those of white identity all-inclusive membership privileges that insulate them from the historical, institutionalized rules long-favoring whites at the expense of black oppression. This privileged lens further perpetuates blindness of not seeing the advantages given to those unaffected regardless of status, character, or merit. Stories of “historically invisible sufferers” as they stand in solidarity must be given the platform to give their accounts. An analysis of white privilege reveals blindness to the moral responsibility of the effects of racism: authenticating the need of further exploring white privilege, opening dialogue, increasing awareness, and facilitating change.

Minor White is one of my favorite photographers. I was intrigued and inspired the first time I looked at his photographs. The first images I laid my eyes on were some of his infrared images and I fell in love. White’s landscape photographs have a large death of field and I believe that helps draw you into his images.His abstract work is very interesting since you never really can tell what White was actually photographing. It draws you in because it makes you curious and want to inspect the image further for a meaning. He was a very technical photographer which I love because I am very technical myself. His attention to detail when he printing his images are remarkable. The contrast in his images remind me of Ansel Adams. They have bright whites,

    Unknown four is C12H22O11, or sucrose. Sucrose is a mixture of two sugars, glucose, and fructose. Glucose is a sugar found in blood and Fructose is a sugar found in fruit. However this substance is most commonly known as plain old sugar. Sugar is used to sweeten food, drinks and other materials. We predicted it was sugar for multiple reasons, one, it was very sticky, and two, because when burned it blew up like a marshmallow.

The objective of the Reducing Sugar Test was to test if the substance has a reducing sugar in it by adding Benedict’s solution and heating it, there would be a color change if a reducing sugar is present, or it will remain blue (no reducing sugar). The objective of the Starch test was to test for starch in substances by using Iodine. The iodine will cause a substance to turn to a dark blue color if it is positive for starch. The objective for the Grease Spot Test was to test if the substance had a lipid. A positive reaction would make a translucent grease mark on a brown paper bag. The objective for the Dye test was to test for lipids. When mixed with water and the tested

Foam began to rise, then decreased creating small bubbles, that did not look as big as the ones in the mystery mixture. A little powder was left at the bottom

Non-Newtonian fluids. What do they do? What are they? A Non-Newtonian fluid is a fluid or liquid that can turn to a solid when pressure is applied. In specifics with oobleck (which is what I used) (made with cornstarch & water) the cornstarch particles get scrunched together like snow in front of a snowplow. So what happens if you hit it? Or run on it? Or poke it? I think it will turn solid right?

This hypothesis relates to the experiment by saying how when different liquids were used, there were many different reactions. Proving the hypothesis is supported. The experiment could be done differently by using other powders, liquids, etc. This could cause many changes. One thing is the expansion of options. It would have many substances to compare to the unknown. Thus creating a lot more options for the unknown powder to be. It could also increase the probability of error, from having so many different resources. Sources of error could include adding too much powder and not enough liquid. Doing this could cause the balance to be off. For example, not adding enough liquid could cause the powder to not react. When in reality, the substance usually fizzes or changed color. Doing this experiment made learning about different reactions to different substances