The fifth formula used for the purpose of calculating the grams of copper produced was moles of Cu multiplied by the gram atomic weight of copper over moles of copper. This ended up being used as .0431 moles of Cu* 63.55 grams of Cu/ 1 mole of Cu = 2.740 grams of copper produced. The actual yield of copper is calculated by the baby food jar and copper mass minus the mass of the baby food jar. 97.7070 grams- 94.8280 grams = 2.8791 grams of copper. The percent yield of copper is calculated by the actual yield (value #6) being divided by the theoretical yield of copper (value #5), then multiplied by 100.
Introduction In the late 1700’s, Jeremias Benjamin Richter defined stoichiometry as the "art of chemical measurements, which has to deal with the laws according to which substances unite to form chemical compounds." In this exercise, we combined copper(II) sulfate pentahydrate with two moles of sodium hydroxide which produced copper(II) hydroxide and sodium sulfate (CuSO4 + 5H2O +2NaOH Cu(OH)2 + Na2SO4). We then dissociated copper(II) hydroxide to produce copper(II) oxide and water (Cu(OH)2 CuO + H2O). The objective of this exercise is to perform a simple chemical reaction where the concept of stoichiometry is put into practice (2). The goal of this experiment was to make Copper(II) oxide.
The theoretical yield should have been more than the actual yield, and the percentages should have been less than 100. The actual data is the result on our experiment vs theoretical, which is based on the calculations above. I have also learned to pay more attention to draining out all of the product completely before continuing to test the experiment, as any small drop of contaminant can veer our results into a different
Purpose/ Methods The purpose of this experiment was to determine the mass percent Cu2+ in a mineral sample (Malachite), and a rock sample (copper ore). Through the process of spectroscopy, the students were able to determine the percent of copper that each sample yielded. The students were also able to apply the information to the theoretical value of copper in malachite to determine the percent error of the mineral mass percent. Furthermore, the methods used in the experiment provide insight into how mining companies determine whether a copper ore mining site will be profitable or not. Mining companies must evaluate samples of rock to determine the percent copper which would provide the most and the purest copper for production of everyday
The calculated value was 1.6 x 10^-5. Conclusions The resulting Ka of the acetic acid from this experiment’s calculations was consistent with the experimental results. The experimental percent of CH3COOH was calculated at 1.6 x 10^-5, while the actual value was 1.8 x 10^-5. The calculated value is much lower because the pH read from the graph at half of the equivalence was higher than the actual value. To have gotten a 0% error between the experimental and actual value for CH3COOH, the pH would have been measured at about 4.75, which is slightly more acidic than 4.80.
Copper ore Copper is typically extracted from oxides and sulphite ores which could be either chalcophite ,chalcocide or covellite and this ore contain about 0.5 and 2.0 percent of copper Concentration by Flotation • Copper ore consist of some of the unwanted mineral and the first step is to remove some of those, this is done by floth flotation • Then ore crushed by a series of cone crusher and further grinded into smaller pieces using milling equipment altogether with water to reduce the dust a After milling the ore is then concentrated by floth flotation the slurry is mixed with various chemical reagent that coat the copper particles ,this done by pouring a liquid called frother or pine oil and then the liquid is pumped into tanks flotation
Copper has a role in synthesis and release of proteins and enzymes involved in cellular energy, nerve regulation, blood clotting and oxygen transport. Copper stimulates immune system, repairing injured tissues and in healing. Copper helps to neutralize free radicals which cause damage to cells. The human body has complex homeostatic mechanisms by which a constant supply of copper is maintained, while eliminating the excess copper absorbed from food. The Absorption of copper depends on the copper content, form of the copper and
scan rate:60 mV/s; mol ratio of copper to phen: 1, 1:1; 2, 1:1.5; 3, 1: 2.The dot line: background; The dash line: CuSO4 solution without phen. Figure 2. The CVs of Cu-phen complex at different scan rates. Scan rate (V/s): 1, 0.03; 2, 0.02; 3, 0.01; 4, 0.008; 5, 0.004; 6, 0.002.Other conditions are the same as in Fig.1. 3.2 Potential-step thin-layer spectroelectrochemical study of
Title : Determination of chemical formula of hydrate Aim To determine the chemical formula of hydrated Copper (II) sulphate, CuSO4 Research Background “When the chemical is heated the hydrate will convert to an anhydrous ionic compound (this means the water will leave it). The moles of H2O will be determined by assuming the amount of mass lost by heating is the mass of the evaporated H2O. The moles of the CuSO4 (the white substance after heating) can be calculated from the mass of the white crystals. Using the molar ratio of moles of CuSO4 to moles of H2O, one can determine the chemical formula of the hydrate.” Apparatus and materials Apparatus and Materials used Quantity Crucible and lid Tripod stand Clay triangle Wire gauze White tile
The Law of Conservation of Mass For the efficacy of this argument, I will ask you grant my assumption that is: Mass cannot be created or destroyed. However, it can be rearranged or changed in form through processes like chemical reactions. All the matter that composes the universe has always been there and will never cease to be there since it cannot be