Determining Percent Composition of Unknown Copper Ore Sample
Iodine-thiosulfate Method: An Analytical Method
The objective of this experiment is to eliminate all interfering species from a sample of unknown copper ore in order to later determine pure copper content. Copper ore can be found in a mineral that contains pure copper and other species that is mined and can later have copper extracted from them (Taher, 1999). To eliminate all interfering species, such as Iron, Arsenic, and Antimony, from a sample of unknown copper ore one can use chemical reactions to eliminate interfering species by reduction and oxidation, and complex formation. Interfering species must be eliminated because they will react with reagent solutions, which ultimately will give untrue results. Iodine- thiosulfate method is used for this experiment, where iodine is the oxidant and thiosulfate is the reducing agent (Kos, 2015). Based on the averages of the percent composition of copper in copper ore being below 50% but above 0.4%, I hypothesize that the percent composition should fall within these two percentages. After completing this experiment, it was found that the unknown copper ore sample has an 11% ± 1%. This result falls within the hypothesized values…
acid base reaction on a copper wire, called the Copper Cycle. The initial and final mass of the copper were measured and percent recovery was calculated to demonstrate that mass wasn’t created or destroyed. The balanced equations, balanced formula-unit equations, total ionic equations, net ionic equations, and half reaction equations were also determined for their appropriate reactions.
In the first step of the cycle, a copper wire was dissolved by reacting it with 16 M nitric acid. A green…
Copper is an element that can be typically obtained from copper ore (minerals) in the Earth’s crust(1). The ore is initially mined then goes through processes to recover copper(2).
Copper is important as it many chemical and physical properties. Copper is a good conductor of electricity and is malleable (the ability to be bent) which is why copper is used in electrical wiring. It is also used in bronze and brass as an alloying agent(3).
Chemists use a sequence of chemical reactions…
Was More Copper Created?
Harshal Patel* and Isaac Cenoz Chem 111-491
Copper is one of the most important and diverse elements found in nature all over the world because it can be chemically reacted with many other elements and compounds. The purpose of this experiment was to identify the different reactions that occurred through the lab and the different types of reactions. Throughout the lab, copper was put through series of reactions to see the different combinations and how its…
percent yield of copper after conducting series of chemical reactions. To study the % yield of copper in the copper cycle, the initial mass and final mass of copper was measured. The chemical reactions involved in the copper cycle are dissolution, precipitation, dehydration, and oxidation/reduction. First, copper was reacted with in a beaker to form (aq) and . The purpose of the dissolution reaction is to convert the copper into solutes in the forms of dissolved components. The was…
Experiment 2: Copper/Iron Stoichiometry
The purpose of the Copper/Iron Stoichiometry lab was to determine which of the two possible iron sulfate compounds formed when reacting aqueous copper(II)sulfate with solid iron metal. The techniques used in this lab were weighing by difference, quantitative transfer, and vacuum filtration. At the end of the experiment it was found that iron was the limiting reactant and iron(II)sulfate was a product of the reaction between…
What will happen when zinc is placed in copper (II) sulfate?
What will happen when copper is placed in copper (II) sulfate?
It is predicted that when you place zinc and copper (II) sulfate a reaction will occur, resulting in a precipitation.
The prediction about the copper (II) sulfate and copper is that nothing will happen.
It is hypothesised that when zinc is placed in aqueous copper (II) sulfate, a single displacement reaction will occur as the…
Percent Copper In Brass Lab Conclusion
The purpose of this lab was to observe the amount of light a solution absorbs, and use the relationships in the Beer-Lambert Law to determine the quantity of a certain compound within a complex sample. First, the relationships between wavelength, concentration, and absorbance were determined. This lab focused on identifying the absorption of copper in various brass samples, and finding the percent copper in brass. In the first activity of the…
Nicole is the Ramen spectroscopy expert in her research group. She wondered whether she could use Ramen spectroscopy to study Copper 3 hydroxide vibrations. However, Copper 3 hydroxide is challenging to study due to its reactivity.
She proposed the work to her advisor who rejected the idea because "it just doesn 't work". From there, she began diligent research in two parts (1) to prove to her advisor that Ramen Spectroscopy should, in theory, be able to measure the vibrations and (2) to map…
Determining the Chemical Formula of a Hydrate
Experiment required: copper (II) sulfate hydrate, 2 crucibles, electronic mass balance, bunsen burner, iron ring, crucible tong, clay triangle, wire gauze, retort stand,
1. Individuals should wear goggles on and tied hair back before the experiment started.
2. The mass of an empty crucible cover was measured.
3. Approximately 2.00g of copper (II) sulfate hydrate samples was taken out and put into the crucible.
4. The mass of the crucible…