Paint Pigment Essay

During this project, the group will be attempting to turn a penny green. Needed in this experiment will be pennies dated before 1982 because that was when pennies were made of copper. During this experiment, the group will be mixing together different chemical reactions in order to get the penny to turn green. The group is trying to create a patina coating on the penny. Patina is referring to the blue-green layer of corrosion that expands on the surface of copper when it is exposed to oxygen and sulfur compounds. However, instead of using simply sulfur and oxide compounds, like the Statue of Liberty, the experimenters will be using a vinegar substitute. The vinegar is being substituted for the acid rain, the acid is the

Drawing the Color Line by Howard Zinn the second chapter from A People’s history of the United States. The authors writes this chapter to explain racism and how it started, “a continent were we can trace the coming of the first whites and the first blacks-might supply at least a few clues” he wants to use history to try to explain why it started. In this chapter Howard Zinn gives us an insight on Slavery and racism in the early 17th century of America. This chapter does not only tell us why slavery accrued but how it happened. The author Howard Zinn tells us how the Americans were simple prone to having slaves because of the circumstances they faced in the early 17th century. It was a period of starvation Howard

Boynton, R.M. 1987. Color. In McGraw-Hill Encyclopedia of Science & Technology (Vol. 4, 165-166) McGraw-Hill, Inc.

Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Using two drops from chemical 1 and two drops of chemical two, unless otherwise stated, then recording the type of physical reaction or color changes that occurred.

It is a chemical reaction where the colors of both solution and iron strip changed. It is

tube was placed inside, then another test tube with an equal amount of substance would be placed

Heavy precipitate emerged immediately and solution turned white in color; solution then became opaque and turned light, bright blue in color.

There was an assortment of different changes indicating that chemical changes were taking place such as change in color or chemicals bubbling when combined with another chemical.

3. The “new” substances that were formed as a result of chemical change were many. When I took the candle and lit it, it burnt and formed smoke. When I took the wooden split and lit the paper on fire, the color around the green paper changed to be brown, burnt and changed into ashes. Also, I poured Hydrochloric acid and magnesium ribbon in a test tube and it started bubbling and it heated up in the bottom.

In the Dyes and Crimes laboratory experiment, the phosphorescence, fluorescence, and chemiluminescence properties i.e. traits of several chemicals were examined using (UV) Ultraviolet lamp. Observations on color, intensity, duration of glow, etc. were analyzed to determine the traits of the several chemicals. Correspondingly, the author of the unsigned note was determined through ink extraction, (TLC) Thin Layer Chromatography, (UV-Vis) Ultraviolet-visible spectroscopy along with the Rf values for of each individual sample of ink compared to the unknown: the ink of the author on the unsigned note. Phosphorescence substances

The art of painting dates back to pre-historic times, the finger used as a paintbrush on the canvas of cave walls. When it comes to painting, artists have many mediums to choose from: acrylics, oils, gouache, fresco, and watercolors. Watercolors is one of the toughest mediums to achieve, its transparent streaks almost impossible to cover up and its various techniques prestigous and precise, but satisfying when accomplished. The incentive a watercolor artist has to get a taste of perfecting their talents is impecable; therefore, striving for perfection can only be accomplished with the understanding of the watercolor history, the use of the tools of the trade, the practice of techniques, and observation of former artists’ approaches.

The colors blue, red, yellow, and green were used in this work

Then we set them under a light for 30 minutes. After the researchers observed the changes in the color of

"A picture can paint a thousand words." I found the one picture in my mind that does paint a thousand words and more. It was a couple of weeks ago when I saw this picture in the writing center; the writing center is part of State College. The beautiful colors caught my eye. I was so enchanted by the painting, I lost the group I was with. When I heard about the observation essay, where we have to write about a person or thing in the city that catches your eye. I knew right away that I wanted to write about the painting. I don’t know why, but I felt that the painting was describing the way I felt at that moment.

The colour of the precipitate was black and were quite small in size, so it was a bit hard to distinguish between the zinc powder present and the copper formed by the displacement reaction because copper formed should be reddish brown is colour – which is also a dark colour and thus two dark colours were hard to be distinguished.