Introduction and Purpose In this experiment, we completed a series of chemical reactions to demonstrate the properties of pure copper and compounds derived from copper. A sample of 0.04 grams of copper was put in a test tube to undergo five different chemical reactions including decomposition, single-displacement and double-displacement. The first reaction consists of adding 40 drops of nitric acid to the copper sample. In second reaction, 6 moles of NaOH was added to the copper nitrate to produce Cu(NO3)2 and then centrifuged, with balanced test tubes, to separate the solid, or precipitate, of the solution and the liquid, or the supernatant. Cu(OH)2 was then heated, in reaction three, to make CuO. In reaction 4, 40 drops of 6 moles of sulfuric acid were added to the solid CuO to dissolve copper oxide and produce copper sulfate. Lastly in reaction 5, 0.2 cm2 of aluminum foil, as well as four drops of 6 moles of HCl, were added in small portions until the aluminum had reacted with copper ion to produce copper metal. Theory and Principles …show more content…
Copper is mainly used due to its better resistance in corrosion than other metals and its unwillingly nonreaction with most strong acids. To investigate and identify the nature of the reactions of copper, one can synthesize copper into a series of chemical reactions and explore its physical and chemical properties. The pure substance undergoing the chemical reaction, in this instant copper, takes on different chemical reactions. There are four types of chemical reactions: combination or synthesis reactions, decomposition reactions, substitution or single replacement
Deductive reasoning was used by determining the identity of an unknown copper mineral by looking at different possible copper minerals in the database with observations that were taken throughout the entire lab. Through roasting, the percentage of mass could be found through the mass of copper contained in an unknown copper containing mineral sample by gravimetric analysis of the copper (II) oxide produced. Through the idea of smelting and spectroscopy the identity of the unknown copper could be found through careful calculations and analysis of the lab.
Adding copper pennies to the vase helps preserve the flower and help it live longer. A copper penny could be used as an antibacterial agent. It helps the flower stay alive longer because the copper prevents the fungi from growing in the inside, which could kill the flower. The help of the penny copper means that there will be none or limited fungi which is one factor why the flower could die faster.
Traveling from the U.S. mint into the hands, pockets, and wallets of citizens, ultimately, pennies will develop a dirty look due to daily interactions with their surroundings. In recent years, many have discovered possible solutions to restore the original shine of copper pennies. In order to determine what solution most effectively sterilizes our common pocket money, it is crucial to understand what makes pennies dull in the first place and what can counter this reaction. Over time, pennies receive a dark coating, creating a dull appearance.
Like silver, the element copper is also oligodynamic. However, unlike silver, copper’s
• N. Dirilgen, 1994, Cobalt-copper and Cobalt-zinc effects on duckweed growth and metal accumulation. Different concentrations of Cobalt2+, Zinc2+ and Copper2+ as well as Co2+Cu2+ and Co2+Zn2+ were added to nutrients given to a species of duckweed, Lemna minor L. the effects of these metals on the growth of the duckweed was recorded. A change in growth was not very noticeable until the concentration of Cobalt (Co) and Copper (Cu) reached 2.00 ppm (parts per million), where the growth of the duckweed was inhibited. It was also discovered that Cu and Co work together to inhibit growth when they are at a certain concentration, and at other concentrations, the one would neutralise the other, creating less of an effect on the growth of the duckweed. The conclusion the I took from this study is that as the
The heating of the solution caused the reaction to start which decomposed Cu(OH)2 and made the solution colorless and darkened the precipitate. The fourth step was the formation of CuSO4. After the solution was decanted from the precipitate and washed with near boiling water, 6 M H2SO4 was added to the beaker containing Copper (II) Oxide and this caused the precipitate to dissolve and the liquid become clear blue. The last step was the formation of Cu(s). This step recovered Solid elemental copper.
The theme of resilience is a prominent one in the novel "Copper Sun" by Sharon M. Draper. The book tells the story of Amari, an African girl who is captured and sold into slavery in America. Throughout her journey, Amari suffers unimaginable hardships, but she also discovers her inner strength and resilience. This essay will examine the theme of resilience in "Copper Sun" and argue that the novel supports the notion that all human beings are given strong spirits in order to withstand the difficulties of life.
Abstract In this experiment the separation of a copper (II) chloride and sodium chloride mixiture was attempted. The main aim was to separate the compounds from eachother while receiving as much of the original mass of both substances as possible - in perfect conditions the original mass will be received after seperation. Many techniques were considered but dissolution, filtration and evaporation proved to be easiest and most reliable in a school environment with school equipment. The copper (II) chloride and sodium chloride mixture was dissolved in a methanol solution and filtered out leaving the sodium chloride behind.
Copper is soft and malleable and has a reddish-orange color. Copper is used as a conductor of heat and electricity, and a building material. Copper is used by automobiles, light and power lines, telephones and radio, and ammunition. These uses are important for humans, and therefore it is important to mine copper, but it is also dangerous for the environment to mine and can harm the community around these copper mines. The top five places where copper is mined are South Africa, Chile, Western USA, Kazakhstan, and Canada.
As copper (II) chloride has a higher hydrogen bond donor and acceptor count than copper (II) chloride, as copper (II) chloride has 0 both hydrogen bond donor and acceptor count where copper (II) sulphate has 5 donor count and 9 acceptor count that shows which solution is stronger. As well Copper (II) sulphate has more complexity of 62.2 while copper (II) chloride has a complexity of 2.8 which indicates which substances are better than the other thus this hypothesis is accepted as copper (II) sulphate is better mixture than copper (II chloride. (”Cupric chloride. (n.d.). Retrieved from” )
Balanced Chemical Equation: Cu(s) + 4HNO3(aq) —> Cu(NO3)2 (aq) + 2NO2 (g) + 2H2O (l) Reaction 2: when sodium hydroxide (NaOH) is added to copper (II) nitrate (Cu(NO3)2), a double displacement reaction will occur. Copper and sodium will displace each other to create copper (II) hydroxide and sodium nitrate. Balanced Chemical Equation: Cu(NO3)2 (aq) + 2NaOH (aq) —> CuOH2 (s) + 2NaNO3 (aq) Reaction 3: When copper (II) hydroxide is heated, a decomposition reaction will occur. The reaction will decompose forming two compounds, Copper (II) oxide, and water. Balanced Chemical Equation: Cu(OH)2 (s) + Heat —> CuO (s)
The objectives of this experiment were to use knowledge of chemical formulas and chemical nomenclature to experimentally determine the empirical formula of copper chloride. Common laboratory techniques were used to conduct a reaction between copper chloride and solid aluminum in order to get rid of the water of hydration. The amount of water of hydration in the sample of copper chloride hydrate was calculated by measuring the mass before and after heating the sample. Afterwards, an oxidation-reduction reaction was conducted, resulting in elemental copper.
Heavy metals had taken a great attention in scientific studies throughout the past years. In this generation, the amount of toxic materials found in land and water as well as in air has increased drastically. Constant development on modern technology depends on usage of heavy metals. Incorporated with this, heavy metals have major disadvantages of being toxic and having a long half-life. ( Godt, Scheidig, and Grosse-Siestrup et al, 2006; Gunduz and Akman, 2012; WHO, 1995; WHO, 2004) Cadmium, chromium and lead, among other heavy metals are known to be dangerous pollutants in our environment.
Tin added in small amounts to copper makes bronze. This results in bronze which is much stronger than both copper or tin. In pure metals, the atoms are arranged in orderly rows and columns. Each atom gives up some of its electrons to create a kind of sea of these randomly moving charged particles. This sea of electrons makes for flexible, metallic bonds that slide past each other, like in copper.
EXPERIMENTAL STUDIES ON MECHANICAL PROPERTIES OF CONCRETE WITH COPPER SLAG AS PARTIAL REPLACEMENT OF FINE AGGREGATE J.UshaKranti1, K.Srinivasu2, A.NagaSai3 1. Asst. Professor, Department of Civil Engineering, R.V.R.&J.C. College of Engineering, Guntur, A.P.,India. 2.