Copper Release Essay

Due to this fact, the concentration of copper in the solution is able to be calculated by using light absorbance. Since zinc doesn’t absorb any light, we are able to deduce that the greater the absorbance, the greater the concentration of copper.

In this task the concentration of an unknown sample of copper sulphate using colorimetry was used to find the concentration. In this investigation copper sulphate was used which is CuSO4.5H20 as a formula. To make a standard solution which was 1M, the same clean equipment was used to make up the standard solution as used to make sodium carbonate. However there was one difference and that was that the hot distilled water was used to dissolve the copper sulphate crystals. There had to be enough hot water in order to dissolve the crystals into the beaker and then add cold distilled water to cool the solution.

The purpose of the experiment is to cycle solid copper through a series of five reactions. At different stages of the cycle, copper was present in different forms. First reaction involves reaction between the copper and nitric acid, and copper changed from elemental state to an aqueous. The second reaction converted the aqueous Cu2+ into the solid copper (2) hydroxide. In the third reaction Cu(OH)2 decomposed into copper 2 oxide and water when heated. When solid CuO reacted with sulfuric acid, the copper returned to solution as an ion (Cu2+). The cycle of reactions was completed with the reaction where elemental copper was regenerated by Zn and Cu

Washing of the copper is necessary in this experiment to separate the iron from the copper and make sure the iron is not counted in the mass of the copper.

The Cu Later lab experiment is designed to allow you to practice lab skills in implementing and performing a series of reactions. Specifically, four types of chemical reactions will occur: oxidation/reduction; double replacement; single replacement; and decomposition. You will begin with a known amount of copper metal, which, after progressing through several steps, is reproduced. In this experiment you will observe and record the various changes such as heat, color changes, and production that occur. This procedure is used to observe some chemical reactions of copper and its compounds while also performing the lab appropriately as to retain the copper as much as

The purpose of this lab was to determine the limiting reactant in a reaction between copper sulfate and iron. Using the reaction between copper sulfate and iron, the reaction was observed to see the reaction and transformation of matter. The copper sulfate was placed into a beaker, as the excess reactant, then iron filings added until the heated solution was completely reacted. This reaction created an excess of leftover. The law of conservation of mass can be observed in this reaction, and using the data found, the percent yield calculated.

Copper wire turned white when submerged in distilled water, little crystal-like substances forming on copper

Section Assignment 3.4 Part F – The Reaction of Iron Nails with a Copper Solution

Purpose: The purpose of this experiment was to observe the many physical and chemical properties of copper as it undergoes a series of chemical reactions. Throughout this process, one would also need to acknowledge that even though the law of conservation of matter/mass suggests that one should expect to recover the same amount of copper as one started with, inevitable sources of error alter the results and produce different outcomes. The possible sources of error that led to a gain or loss in copper are demonstrated in the calculation of percent yield (percent yield= (actual yield/theoretical yield) x 100.

The lab performed required the use of quantitative and analytical analysis along with limiting reagent analysis. The reaction of Copper (II) Sulfate, CuSO4, mass of 7.0015g with 2.0095g Fe or iron powder produced a solid precipitate of copper while the solution remained the blue color. Through this the appropriate reaction had to be determined out of the two possibilities. Through the use of a vacuum filtration system the mass of Cu was found to be 2.1726g which meant that through limiting reagent analysis Fe was determined to be the limiting reagent and the chemical reaction was determined to be as following:-

oligospora) is one of the best researched nematophagous fungi, with strains found in diverse soils including decaying wood and metal-polluted soils, and thus lived as saprophytes (Yang, et al., 2011). Over the years, chemical control of nematode parasite species is very expensive and does risk affecting the agricultural ecosystem, by having detriments on beneficial predators and microbes. This has raised the concern in seeking biological control methods such as using A. oligospora. Hyphal trap formation is dependent on environmental conditions; parasitic nematodes generally attack the roots of plants hence, A. oligospora tends to colonize the roots and is advantageous for biological control. (Singh, et al., 2012) The fungi's broad range of adaptability and development make them ideal candidates for regulating parasitic nematodes of plants and animals in agriculture since the trapping encompasses adhesion, penetration, and immobilization of nematodes (Zhao, et al.,

The samples were removed from exposure after an interval of 25 days , and analysed for colour changes and degradation. 4.1.3.3. Degradation Due To Soil

Adding wood preservatives to wood can drastically change the effect of wood decay on wood. Normally, when wood with no preservatives is submerged in water, it only takes a couple of days for the wood to decay (exact amount can vary depending on the original integrity of the wood). When preservatives are added, the time period is increased but not prevented. It can take anywhere from a week to a month or more depending on the type of wood preservative (Hendricks, Hoffman, Powell, 2011). When selecting the best wood preservatives to prevent wood decay, it is crucial to know if it is interior or exterior, be able to compare and contrast the different selections, the history of the wood preservatives, and what the preservatives are made to

0.5% of copper sulphate solution was added by drop at a time and and the test tube was shaked continuously.

Phytoremediation is the process by which plants and trees are used to remove or stabilize hazardous pollutants that exist in soil, sediments, surface water or groundwater. The EPA (environmental protection agency) estimates that more than 30,000 sites in the U.S. are in need of environmental treatment, and a great number of these sites are contaminated with highly toxic metals. Abandoned or under-used commercial and industrial facilities, termed as “brownfields,” are a major contributor to this environment concern. “Brownfields” pose significant health risks to nearby residential populations and threaten the plant and animal life close to them. Phytoremediation provides a very