Silver Ornament Using Oxidation Lab

c) Silver jewellery tarnishing in the air is a chemical property because the silver is reacting with the air, changing the silver

The purpose of this lab was to make a substitutional alloy coating the penny in a gold color. The color of the penny depends on the Zinc and Sodium Hydroxide solution, and if heat was added or not. We took a copper penny and boiled it in a Zinc and Sodium Hydroxide solution. Then we took the penny out, rinsed it in water, and dried it off. Now the penny was silver. We then took the penny and waved it across a flame causing it to turn gold. Some errors that happened were getting Zinc in our water and over cooking the penny. These could be fixed by rinsing the Zinc off the penny in its solution before taking it out and not heating the penny for as long. A suggestion for improvement would be getting the flame at the lowest temperature possible.

about how the Portuguese would go to China and Japan, and return with massive ships filled

When most people see beautiful pottery or a delicate glass bowl, their minds do not go right to the science behind the art. They see the pot or bowl and only see the beauty and creativity that was required to make something so unique. Little do most people know, the artist is using chemistry to manipulate the material into something beautiful. As seen in pottery, from the molecular structure to its glazing, as well as the amorphous properties of glass and glassblowing, chemistry plays a vital role in the beauty of art, and it is important for artists to know the scientific processes behind their work.

Created a Metallic Luminary with all the supplies packet in your candle. Makes for the perfect Thanksgiving table center piece. Enjoy crafting during Fall Break with your kids!

The zinc and sodium hydroxide solution, when heated formed sodium zincate* (Na2ZnO2) which when introduced to the copper penny the zincate ions (ZnO2-2) in the solution to bind to the copper of the penny, after a minute it gets reduced to metallic zinc that coats the penny. This process involved a chemical change as the sodium zincate formed, and a physical change as it coated the penny, a new substance was not formed. When the penny was heated over the bunsen burner flame the zinc and copper combine to form the metallic mixture brass. This process was a chemical change as the copper and zinc melted together to form a new substance. Copper is a substitutional alloy, meaning that because the elements Zinc and Copper are close to each other on the periodic table, they are similar in size and can easily exchange atoms (zinc gives to copper). We could have tested whether or not the substance was gold by measuring the density of the penny, or by applying nitric acid to the penny and looking for signs of oxidization, but it was easy to observe that there was no miraculous change from copper to gold. In conclusion, my hypothesis that the pennies wouldn't turn into gold, but rather a copper alloy was correct. The substance actually created was not gold but brass, a copper and zinc

In 1938, Joe St. Clair built a small glassmaking workshop in the backyard of the family home. It was merely equipped with machinery that’d been cast out of other nearby factories, but within a few short years, he and his family had made a name for themselves in the art glass industry. The company has changed hands and locations a number of times since 1938, but St. Clair Glass is still famous for its floral paperweights. Today, St. Clair Glass is called the “House of Glass” and is owned by Joe Rice, a descendant of Joe St. Clair. Rice continues to craft art glass in the family tradition while bringing new technologies and ideas to the

Glassblowing is a very intricate form of art. Glassblowing is the art of making glass in all different forms and shapes. The history, early work, and the introduction of glassblowing will be discussed, as well as the materials, equipment, and the techniques and procedures.

Silver is a precious metal with a wide array of uses. Silver value has been an acknowledged standard since ancient times when it was the major currency of trade. Although silver value has diminished over the recent times, it still plays a major role in the international market today.

While it seems metallic and glossy, it starts to consume promptly in air because of the dampness introduce.

Silver has the chemical symbol Ag and an atomic number of 47. It is not very chemically active, and does not react with oxygen in the air under normal conditions. It reacts slowly with sulfur in the air resulting in the product silver sulfide, a black compound, the tarnish that develops on silverware and silver plated objects. It doesn’t burn except for silver powder and it doesn’t react readily with water, acids or many other

The purpose of the experiment is to obtain silver nanoparticles from the reduction reaction between silver nitrate and sodium borohydride. Silver atoms are aggregated after silver nitrate was reduced by sodium borohydride, with the aid of sodium citrate to manipulate the sizing of silver nanoparticles. Without sodium citrate, bulky, ununiformed precipitates will begin to form without control. Hydrogen peroxide served as an oxidizing agent to balance out the reduction of sodium borohydride and oxidation of hydrogen peroxide. Hydrogen peroxide & sodium borohydride shall not react particularly in this experiment. Typically, when those two reagents react, H2 gas will form. There was no sign of bubbles produced during the reduction experiment, mostly dependent on the quantity used and procedure of chemical mixing. There was presence of other chemicals within the solution, which reduces the probability of reaction occur between two reagents.

Nanotechnology is a rapidly growing science of producing and utilizing nano-sized particles that measure in nanometers (1nm = 1 billionth of a meter). One nanomaterial that is having an early impact in healthcare product is nano-silver. Nano silver water is almost pure atomic sized particle and de-ionized water with silver in suspension. Approximately 80% of the silver is in the form of metallic silver nano-particles and the remaining silver is in ionic form. The size of silver particles in nano- silver are less than 2 nm in diameter. Because of the small size of the particles, the total surface area of the silver exposed in solution is maximized, resulting in the highest possible effect per unit of silver. As a result, the

Comparing a material's initial treatment and the microstructures that are formed from different processes, an engineer can accurately understand why certain treated materials of the same family can be stronger than another. In this experiment annealed and cold-worked specimens of AISI 1018 STEEL are used, along with a Hardness tester, a grinding and polishing process, and a micrograph to see the grain structure of the steel. After putting a specimen through a process using each piece of equipment, grain structures of differently treated materials can be compared. The Hardness Tester gives a value of the strength of a

Preparation, characterization, and physical properties of a nanostructure materials of silver (nanoparticles and nanocomposites) have been the subject of various researcher in many scientific laboratories during the past years for many studies and it has been also established that size, stability, color, shape, and properties