Since copper can carry electric current without losing excess amount of energy and also having small resistant to electricity, including its property of being ductile and malleable, it can be rolled into cables for wiring purposes in constructions. Moreover, just because it conducts heat, it can be used for heating systems and purposes. Copper can be used to make jewelries. It can be alloyed with other elements. Generally, copper can be used for electric cables, alloys, sheets, pipes, gutters and tools.
History of Copper-Nickel Alloys Copper-nickel is an alloy of copper that contains nickel. The percentage of nickel in copper-nickel alloy can be vary depending on the applications. The use of nickel in coinage was employed for about 2000 years ago by many countries even though nickel metal was only discovered by scientists later on. This statement can be confirmed by the discovery of coins from antique that contain approximately 10% to 15% of nickel element. The oldest copper-nickel coin comes from the period BC 235.
Copper wire was originally known for its high electrical conductivity, making it the natural choice for wire at the time. Commercially, pure copper was easily producible, making it cost effective. The downside of copper wire was the fact that was low in core strength and would soften in relatively colder climates. Even though this weakness occurred the industry alloyed copper with various materials in order to overcome the
The Single Replacement Lab of Iron Replacing Copper in a Copper (||) Chloride Solution Lab The purpose of this lab was to help the students further their understanding of single-replacement chemical reactions, and to have a hands-on experience with it in order to practice equation writing and stoichiometry functions. In this experiment, an iron nail was placed in a solution of Copper (||) Chloride that was dissolved with water in a baby food jar. Observations were taken over the next three (schools) days. On day 1, the masses of the baby food jar, the Cu (||) Chloride, and iron nail were recorded. The nail was placed in the Cu (||) Chloride and water solution.
Balanced Chemical Equation: Cu(OH)2 (s) + Heat —> CuO (s) + H2O (g) Reaction 4: when a sulphuric acid is added to the solution that contains copper (II) oxide, a double displacement reaction will occur. the copper (II) oxide will react with the sulphuric acid producing copper (II) sulfate and water. The copper and hydrogen gas replace each other. Balanced Chemical Equation: CuO (s) + H2SO4 (aq) —> CuSO4 (aq) + H2O (l) Reaction 5: when zinc is added to the copper (II) sulfate solution, a single displacement reaction will occur. The zinc will form a new compound with the sulfate, and the copper will stay as a metal.
Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service Copper Copper is an essential trace mineral, present in all body tissues, which plays a role in the formation of connective tissue, and in the normal functioning of muscles and the immune and nervous system. copper is necessary to The human body because of copper very important for normal growth and health, too Copper along with iron is a critical component in the formation of red blood cells, and can prevent osteoporosis and promotes healthy connective tissues ( skin, nails, hair, and blood vessels).
The largest use of platinum is jewelry, which makes up 50% of platinum’s use. Platinum is even more valuable than gold, because platinum’s structure is denser than gold, and only 160 tons of platinum is mined per year, compared to 1500 tons of gold (Ira Weissman, huffingtonpost.com). Because of its molecular density, platinum is rarely combined with with other metals unlike gold. If one has an allergy to nickel, platinum is the way to go, because nickel is mixed in with gold to create white gold. White gold is a mix of yellow gold with other metals, and dipped in rhodium in order to create a whitish colour, instead of yellow.
The overall goal of this lab was to produce an unknown oxalate compound, find its percent composition, calculate its molecular formula, and determine the limiting reactant in its formation. A reaction between iron III chloride hexahydrate and potassium oxalate monohydrate produced 3.307g of potassium trioxalatoferrate (III) trihydrate with a 62.0 percent yield. A permanganate titration determined the average percent composition of oxalate was 53.3% with a 2.22% standard deviation. The percent composition revealed the compound’s empirical formula to be FeK3(C2O4)3•3H2O. Potassium oxalate proved to be the limiting reactant.
Ashley Wilson 5 March 2018 General Chemistry Lab – Section 202 Experiment 7- Copper cycle Purpose: A series of reactions that convert a piece of copper metal, via several different copper- containing compounds, back into its original elemental form will be observed. Copper wire was dissolved in nitric acid. NaOH was then added to the dissolved copper solution, precipitating into Cu(OH)2. The precipitate was then placed on a hot plate and stirred until it became CuO. After sitting , the CuO was decanted twice, and H2SO4 was added.
2.1. Use of Glass in Everyday Life 2.1.1. Glass Mirrors One of the most common uses of glass in our everyday lives is in the glass mirrors that we have at home. In the early years, mirrors were largely made of polished metal such as copper and bronze. As can be guessed, these were not the best materials from which mirrors were made and it was not until the thirteenth century that good-quality glass mirrors became common.