DEPARTMENT OF CHEMISTRY TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY NAME: OPOKU ERNEST DATE: 21ST JANUARY‚ 2014 Page 1 of 9 TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY AIMS AND OBJECTIVES: By the end of this experiment‚ the student should be able to demonstrate the following proficiencies: 1. To determine the percentage of copper in brass by UV-visible spectroscopy. 2. Properly calibrate and use a spectrophotometer. 3. Convert percent
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Determination of % Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Introduction: Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL‚ then the theoretical yield of copper should be equivalent to the actual yield. Purpose: In this lab‚ we will determine the percent composition of a modern (post-1982) penny by using a strong acid to react and dissolve the zinc
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DATE: 21-01-14 ANALYSIS OF COPPER IN BRASS BY UV – VISIBLE SPECTROSCOPY AIMS/OBJECTIVES; To determine the percentage of copper in brass by UV-visible spectroscopy. INTRODUCTION Electromagnetic radiation‚ of which ultraviolet and visible light are but two examples‚ has properties of both waves and particles
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In 1928‚ Raman spectroscopy was introduced by Sir Chandrasekhara Venkata Raman an Indian Physicist‚ together with K. S. Krishnan. For this tremendous contribution in Physics‚ Sir C. V. Raman got Nobel prize in 1930. Write something about Raman signal‚ where does it come from? What are the implications of Raman? Raman is the inelastic scattering of light. The meaning of inelastic scattering is observable from the figure below. When an electron is excited by photons of applied light‚ it jumps from
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Thank God for the Atomic Bomb In Paul Russell’s passage from Thank God for the Atomic Bomb‚ he describes how the atomic bombings of Hiroshima and Nagasaki were fully necessary. Russell agrees with President Truman’s decision to drop the atomic bombs because of the logical reasons. He gives examples that compare to the overall effect to America‚ and the positive things that happen to America such as the fact that the war would be over. I agree with Fussell’s opinion because the atomic bomb solved many
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Were the atomic bombings in Hiroshima and Nagasaki necessary to save allied lives and to end Japan’s threat to world peace? Did the resulting loss of life cost more than a deadly invasion of the Japanese mainland? In August 1945‚ the first dropping of atomic bombs in civilian areas of Japan killed hundreds of thousands of innocent people. Immediately following those bombings‚ Japan surrendered to the United States. The following essay summarizes the defense of the atomic bomb and its use‚ the arguments
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On August 6‚ 1945 the United States dropped the first atomic bomb ever on the Japanese city of Hiroshima. They also dropped a second bomb three days later‚which eventually ended World War ll. Was it the right thing to do? It created many controversial dilemmas on whether it was right or not. There are many people who oppose the use of the atomic bombs; though there are some that believe it was a necessity in ending the war. I think that there could have been other ways to end World War ll.
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WAS THE ATOMIC BOMBINGS OF HIROSHIMA AND NAGASAKI JUSTIFIED? A bomb which was equal to 13‚000 tonnes of highly-explosive bombs‚ used to make the Japanese surrender‚ but also killing many lives‚ cannot be justified. When the highly-explosive bombs were dropped in Dresden‚ everyone had thought of this as very affective. But imagine how bad the atomic bomb would be‚ which could destroy a city only just by its radiation‚ let alone the actual explosion. President Truman of America made a decision of
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Of all of the many scientists who played a major role in the formation of the atomic theory‚ it is believed that Dalton‚ Rutherford‚ Thompson‚ Bohr‚ and Planck are the five most influential. The research of this theory has gone on for many years and each and every one of them have brought us closer to our current understanding of the atom today. Each one of them played a special role in the development process of the atom and most importantly‚ they all reflected on one another. Many influential scientists
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nineteen-thirties war had come to multiple countries‚ causing the Second World War. Numerous people lost their lives‚ friends‚ and even family members‚ which contributed to many Americans feeling unguilted about the atomic bomb. When the United States made the decision to drop the atomic bomb on Japan‚ there were mixed feelings over the morality of using it to end our war‚ but an overall sense of relief to bring the war to an end after such exhausting years. In nineteen thirty-nine‚ Germany orchestrated
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