To determine the concentration of an unknown sodium oxalate (Na2C2O4) solution by titrating it against standardized potassium permanganate solution (KMnO4). • To determine the percent by mass of Fe(II) in the form of ferrous ammonium sulfate Fe(NH4)2(SO4)2.6H2O in a mixture by redox titration. B. Theory: (electron transfer reactions) 2Mg (s) + O2 (g) 2MgO (s) 2Mg 2Mg2+ + 4e- O2 + 4e- 2O2- Oxidation half-reaction (lose e- ) Reduction half-reaction
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test tube‚ small test tube‚ evaporating dish‚ and blow torch. The data we found was that it turned blue after a period of time. The reaction was CoN- OH. The second station was very interesting. The procedure was to place 3 small drops of cobalt nitrate into a test tube in the rack. Place 6 drops of sodium hydroxide in the second test tube. Pour test tube into test tube one. Record the results. Dump the contents of the first tube into the filter funnel that has already been set up for you. Rinse
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Explosive Welding-Rough Draft The development of explosive welding was first recognized by Garl in 1944. But it was not recognized in the United States until 1957 when it was observed by Philipchuck that metal sheets that were being explosively formed would occasionally stick to other metals. Over the decades the process has been developed fully with large applications in the manufacturing industry. Explosive welding is a solid-phase process where welding is accomplished by accelerating one of
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 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
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c) two d) four D 4. Potassium bromide is an example of a(n) __ compound. a) molecular b) organic c) polyatomic B d) ionic 5. The only common polyatomic ion that has a positive charge is the __ ion. a) phosphate b) ammonium c) sulfate d) nitrate Chemistry 11 Exam Review – Answers - Page 1 A B D 6. In the formula H2SO4‚ the number 4 would be called a(n) __. a) subscript b) oxidation number c) coefficient d) charge 7. Which subatomic particle contributes the
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were other methods utilized in lab as well: the Mannitol Salt and Eosin Methylene Blue Agar and the tryptic soy broth experiments. Oxygen reaction (aerobic vs. anaerobic)‚ glucose fermentation‚ oxidase reaction‚ the catalase test‚ urea hydrolysis‚ nitrate reduction experimentation‚ Kligler’s Iron Agar‚ the SIM medium test and lastly the IMViC series of tests. All the biochemical tests were carried out in properly supervised manner to compare the unknown bacteria to the six known that were mentioned
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3 Research-based Principles Guiding Watershed Management The purpose of this section is to identify various principles of watershed management that form the basis for the specific goals and implementation objectives for management of the Sudbury watershed lands during the period covered by the plan. These principles are distilled from a literature review of nearly 400 different sources‚ many of which are included in the Literature Cited listing at the back of this plan. 3.1 Principles
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Coordination Complexes of Cobalt Advanced Inorganic Chemistry Lab 02/27/2015 Abstract When the transition metal‚ cobalt‚ forms a complex involving a nitrate ion‚ the ligand has the ability to coordinate via N or O. The ability of the nitrate to attach via the N or O gives rise to the term‚ linkage isomers and can affect the functionality of the complex with other molecules. To explore structural differences between complexes‚ pentaaminechlorocobalt (III) chloride‚ pentaaminenitritocobalt (III)
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Part A: Omnivore’s Dilemma is a scathing indictment of the industrial food system we’ve perfected over the last century. Michael Pollan is a prolific author and journalist and muckraker who concentrates his efforts on the food system and the environment. Omnivore’s Dilemma is his tour de force‚ with which he successfully deconstructs the food system into three principle food chains: The Industrial‚ Organic‚ and Hunter-Gatherer. Pollan begins with arguably the most important and certainly the largest
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The Corporate Takeover of American Farming Introduction We are literally eating ourselves to death. For the first time in American history‚ the generations born after the baby boomers face a lower life expectancy than their parents did. This situation is largely a result of a product that we cannot even eat until it has been processed into our food and drink supply. This food‚ plus a sedentary life-style‚ have caused an epidemic of obesity which has been on the rise in America for the past
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