Respectively‚ in Figure 3‚ a large deviation amongst the initial and final quantity of copper‚ this implies that the rest of the mass that had diminished‚ was greater than the final product. These findings correlate to Figure 2 calculations as‚ the % yield was reasonably insignificant of 49.12%. The initial mass of Copper was‚1.598g; whereas‚ the final amount of copper was‚ 0.785g. This suggests that the 0.813 g of copper could have transitioned into Hydrogen gas‚ and therefore contradicting the hypothesis
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# Now You See It – Copper Cycle Lab The purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the
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Reflection on “a thousand splendid suns” “One could not count the moons that shimmer on her roofs. And the thousand splendid suns that hide behind her walls." Closing the book‚ I just feel real and hopeful. I will not say this story is a tragedy‚ and I hate when people generalise it as a book where everyone died except for Laila‚ Tariq and their children. Indeed‚ a depressing and melancholy mood is seemed to be perpetuated throughout the book‚ which has a large time frame spanning over
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Although the story of two women under oppression in Afghanistan during the Taliban’s rule may seem distant and irrelevant‚ Khaled Hosseini’s A Thousand Splendid Suns (418 pages) is a heart-wrenching historical novel that delves into the intertwined lives of Mariam and Laila‚ two women married to the same abusive husband‚ and the struggles they face. The novel takes place in Afghanistan‚ beginning in the 1960s with Mariam’s childhood and ending in the early 2000s with Laila and Tariq’s reunion. Poverty
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10/24/2013 LAB TITLE: Single Replacement Reaction of Solid Copper with Silver Nitrate PURPOSE The purpose of this lab is to: • Observe a single replacement reaction‚ and • Calculate the mole ratio of silver (Ag) to copper (Cu) in the reaction MATERIALS • Copper wire (30 cm) • Large test tube • 250 ml beaker • Silver nitrate (AgNO3) powder • Dilute AgNO3 solution • Distilled water • Electronic balance
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a strong acid to dissolve all the zinc inside the outer copper shell. The reaction follows as such; Zn+2HCLZnCl2+H2‚ but there will be no reaction with copper. The portion that will be measured is the mass of copper left after all of the Zn goes through the reaction process. Hypothesis: If the penny is post-1983‚ then there will be a percent yield of copper greater than 30%. Research Question: What is the percent composition of Copper and Zinc in a post-1983 penny? Aim: The purpose is to
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draw a label line to where this green pigment would be found‚ and label it P. Fig. 1.1 [1] © UCLES 2010 0653/21/O/N/10 3 (c) A student fixed a piece of black paper over a leaf‚ which was still attached to the plant. He left the plant in the sun for two days. He then removed the leaf from the plant and tested it for starch‚ after removing the paper. (i) Using the letters given‚ list the correct sequence of the steps he took. A Add iodine solution to the leaf. For Examiner’s Use B Place the
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Exercise in Extracting Copper from a Synthetic Copper Ore Your Name __Mel Hine______________________ Partner’s Name __Jay Ranson____________________ Date _October 2‚ 2012____________ Introduction This laboratory exercise involves the use of dilute sulfuric acid (H2SO4) to leach copper from a synthetic copper-containing ore
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Determination of Trace Amount of Copper and Zinc in an Aqueous Solution by Atomic Absorbance Spectroscopy Abstract: The purpose of this experiment is to analyze a sample containing copper and zinc in trace amounts‚ where standard addition method was used and the instrument used is the atomic absorbance spectroscopy. The amount of copper obtained was 0.569 ppm ± 0.015 and for zinc we obtained 0.42 ppm ± 0.0027. Introduction: This method implies the excitation of particles in the solution sample
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2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains magnesium ions(Mg2+)‚ iron (II) ions (Fe2+) and copper ions (Cu2+). On passing an electric current through this solution which ions will be the first to be discharged at the cathode. Write the equation for the cathode reaction. Ans.: - Mg2+ Q.4. An electrode ‘A’ is connected to the positive terminal
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