代做IA Planning Sheet – Chemistry代写C/C++语言
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Frame. research question, variables and method
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1. What is your research question? Include independent variables, dependent variables and method in title. How does varying the concentration of copper ions (Cu²⁺) in the electrolyte solution affect the rate of electrolysis by using copper electrode and graphite electrode and measuring the mass added on the graphite electrode? |
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2. What is your independent variable? (What are you changing? How will you change it?) (1) the concentration of the copper ions in the electrolyte solution |
4. What is your dependent variable? (What are you measuring? How will you measure it?) (1) The mass change on the graphite electrode (2) The temperature increases of the electrolyte
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3. What range will you choose for your independent variable? Your range should aim to be at least 5. For instance, 5 sites to measure pH, 5 different soil samples, 5 different types of water. If you can be specific, list your range here. 5 different copper ion concentration in the electrolyte concentration including 1M, 0.5M, 0,25M, 0.125M, 0.0625M |
5. How will you measure your dependent variable? What equipment will you use? Is it possible to do repeats of this method? For instance – will you do a titration? (1) Electronic weighing equipment (2) Dryer (3) Thermometer
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6. Control Variables What are going to try and keep the same? Why is it going to be important? How will you keep it the same? |
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Variable |
Why is it important? |
How will you control it? |
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Voltage |
It provides more energy, overcomes overpotential, accelerates diffusion of reactants and products, and increases current. |
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Temperature |
The temperature will change the kinetic energy of molecules, increase the speed of ion movement and the reaction constant K, decrease the resistance and provide sufficient energy for overpotential. |
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Concentration and volume of sulfuric acid in the electrolyte
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The conductivity is influenced by the concentration of H⁺ and SO₄²⁻ which will affect the speed of copper ion movement. |
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Brand of the copper electrode and graphite electrode |
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The surface area of graphite electrode |
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The distance between the copper electrode and graphite electrode |
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7. Apparatus
What are the materials you need? BE AS SPECIFIC AS YOU CAN. Think carefully about the quantities you need, can they be reduced? |
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Name of equipment |
Sizes and uncertainty (if known and appropriate) |
Quantities |
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Name of chemical reagents |
Quantities |
Additional information (e.g. Concentration required) |
Hazard to experimenter and environment |
Disposal method |
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8. Risk assessment in summary
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9. Experimental Method. Use bullet points to outline how you investigate your research question. Is this method reproducible? Will it allow time for repeats?
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10. Diagram |
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