oxidized at the anode. There were three different solutions used in the experiment in order to have a better understanding of electrolysis reactions. From each solution‚ reaction equations were produced. The reactions could be observed from the indicators used. The reactions showed that hydrogen ions were produced at the anode‚ making it acidic and hydroxide ions were produced at the cathode‚ making it basic. In all parts of the experiment‚ the reaction that took place at the anode was 2H2O(l) O2(g)
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Path Cathode _____________________________CORRTECH The Corrosion Damage Begins Rust expands volume 5-10x’s Internal stress + 5‚000 psi Electron Migration (e-) _____________________________CORRTECH Corrosion Cell Elements • • • • Anode Cathode Metallic path Electrolyte Eliminate
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which need only small currents such as portable items (radio). It consists of a zinc outer casting‚ the anode‚ an aqueous paste of ammonium chloride and a mixture of powdered carbon and manganese dioxide around a carbon rod‚ which is the cathode. Initially no zinc chloride is present‚ but as the cell is used zinc ions are formed and ammonium ions are discharged. The reaction at the anode‚ the zinc cylinder is: Zn(s) → Zn2+(aq) + 2e- At carbon rod (cathode)‚ reduction half reaction is: MnO2(s)+
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can undergo reduction and the other oxidation. A typical galvanic cell is based on the spontaneous redox reaction: Net Ionic Equation Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Half Equations Zn(s) → Zn2+(aq) + 2e– Cu2+(aq) + 2e– → Cu(s) The anode will undergo reduction (Zinc) and the cathode will undergo oxidation (Copper) The two half cells must be physically separated so that the solutions do not mix together. A salt bridge is used to separate the two solutions yet keep the respective charges
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MARINE GROWTH PREVENTION SYSTEM AIM: To prevent fouling and growth of marine organisms in the pipe lines which are in contact with sea water. What is Marine Growth: Ships while sailing use seawater for several purposes. The seawater is used in the ship’s system and discharged after the use. However‚ seawater contains several marine organisms which enter the ship along with the seawater and deposit and flourish on the parts of the ship’s system. If preventive
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Chemistry Batteries [Chemistry HSC Course-1] What is an Anode? An anode is the negatively charged electrode of an electrical device but in this a primary cell‚ that supplies current. What is a Cathode? A cathode is the positively charged electrode of an electrical device which in this case is a primary cell‚ that supplies current. What is Current? A flow of current which results from the ordered directional movement of electrically charged particles. A current is the rate of flow of charge
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as otherions that permit the flow of electricity. A power supply supplies a direct current to the anode‚ oxidizing the metal atoms that comprise it and allowing them to dissolve in the solution. At the cathode‚ the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode‚ such that they "plate out" onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated‚ vis-a-vis the current flowing through
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* Page#1: Problem * Page#2: Hypothesis * Page#3: Background research * Page#4: Materials * Page#5: Procedure * Page#6: Results * Page#7: Conclusion * Page#8: Bibliography Where is your money going? Did you know over a million dollars go to waste from buying a ton of batteries that barely work. For my science fair project I am going to test the 4 most popular brands of batteries in America‚ Duracell‚ Energizer‚ Rayovac‚ and a Alkaline battery named Enercell
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INTRODUCTION In 1791 Luigi Galvani discovered electrical activity in the nerves of the frogs that he was dissecting. He thought that electricity was of animal origin and could be found only in living tissues. A few years later‚ in 1800 Alessandro Volta discovered that electricity could be produced through inorganic means. In fact‚ by using small sheets of copper and zinc and cloth spacers soaked in an acid solution‚ he built a battery - the first apparatus capable of producing electricity. Naysayers
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For that we have learned and studied these contents. I will concisely review about that. first‚ The structure of OLED is actually pretty simple. it consists sandwiched organic films between anode and cathode. principle is that Excitons are generated by electrons from cathode‚ holes from anode. when its fall down to ground state‚ energy release as the form of photon. at that time‚ OLEDs emit light. these are making process of oled. after etching cleaning and drying ITO‚ we operate
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