STEP 1: Test the conductivity of the glasses with a volt meter. Look for the side which has resistance. To start this experiment off, we needed to determine the conductive side of the glass. The conductive side will have the resistance. This will be the most active in this experiment. It will take a huge part to this experiment because it contains the electrons that this experiment requires. STEP 2: Tape down the conductive sides to the table. Place each side with two pieces of tape except the side closest to you place one piece. Taping down the conductive side is a crucial part to this experiment. The tape helps control the thickness of the titania on the glass, which influences the voltage. The area of the titania on the glass also affects the voltage outcome. The lengths of the sides will determine the area of which the electrons will move around. Because of this, the strength of the voltage will be depended on this as well. There also needs to be enough space away from the edge of the glass so that we can attach the alligator clips without it failing to measure the voltage that it has the ability to produce. The space is also crucial because it is where the iodine solution will enter the photovoltaic cell. The placing of the tapes is an important first step that help the cell reach its full potential. STEP 3: Clean the surface with isopropyl alcohol. The isopropyl alcohol disinfects the surface and also cleans it, which is important. The particles that are still on the conductive glass may affect the performance of the photovoltaic cell overall. The particles that are not cleaned off have the potential to disrupt the flow of electrons that create the electricity that flows through the cell. STEP 4: Prepare a paint ... ... middle of paper ... ...this project. We discovered that the photovoltaic cell and galvanic cells are, in a couple ways, similar to each other. They both share similar concepts such as the concept of the salt bridge. The photovoltaic cells contain its own version of a salt bridge which gives the cell its balance in ions. In this case, it is the iodine solution that acts as the salt bridge. The I^-/I_3^- is used as the couple in this redox reaction. At first when the cell is introduced to the sunlight, the entropy, or the disorder of the electrons, will be high. After a while, the electrons will stabilize into a certain position which makes the voltage also stabilize. Works Cited http://chemistry.beloit.edu/classes/nanotech/solar/mattoday10_11_20.pdf (Forbes) http://cdn.intechopen.com/pdfs-wm/30952.pdf (Dubay) http://www.solar-facts-and-advice.com/cadmium-telluride.html (SBI)
Therefore any changes in the cell are ascribable to the working electrode. The control of potential of working electrode with respect to reference electrode is equivalent of the controlling of energy of electrons within the working electrode. As shown in Fig. 1.3, scanning the potential in the negative direction makes the electrode a stronger reductant, whereas scanning the potential in the positive direction makes it a better
In the early 1800’s, Italian chemist Luigi Brugnatelli invented the process of electroplating . He used an invention called the Voltaic Pile (originally discovered by Allessandro Volta). The voltaic pile is a machine that provides a steady stream of electricity, the first device of its kind. Brugnatelli described what he did as taking an object and applying electricity to it while taking on the visual characteristics of a specified metal. Potassium Cyanide wasn’t included in this process until four decades later. John Wright is accredited with that processional addition. His process was the first to include an electric current which passed through a tank of water. The official patent for electroplating...
My hypothesis for this experiment is that the heat study tube will turn blue, the cooling study tube will turn green, the dehydration study tube will turn blue, the hydration study tube will turn green, and the common ion effect study tube will turn blue.
5. Put the stirring wire through the second hole of the stopper. Insert the stopper, thermometer, and wire into the test tube. Make sure that the thermometer bulb is below the surface of the solution.
Placed 30 mL of water within a beaker and placed the metal sample within the beaker. After placing the metal sample within with beaker the volume of water in the beaker changed. The volume change was recorded for the volume of the metal sample.
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
Chemical kinetics is a branch of chemistry that involves reaction rates and the steps that follow in. It tells you how fast a reaction can happen and the steps it takes to make complete the reaction (2). An application of chemical kinetics in everyday life is the mechanics of popcorn. The rate it pops depends on how much water is in a kernel. The more water it has the quicker the steam heats up and causes a reaction- the popping of the kernel (3). Catalysts, temperature, and concentration can cause variations in kinetics (4).
Photovoltaic electrical energy is the result of the “photoelectric effect”, a phenomena that occurs when metals are exposed to sunlight. The photovoltaic effect results in both a voltage and a current, the two ingredients for electricity’s generation. This is defined as a clean energy mechanism as the source of the energy is the sun and results in electrical energy being generated without the “products of combustion: Carbon Dioxide CO2” as is the case with fossil fuels (coal, gas, oil). It’s ad...
Iron nail (1) Paperclips (several). Power supply (1) Coil (1) Method: - - - The method is relatively systematic. We first allocated various people amongst our group to collect different equipment such as the iron nails, paperclips, coils and power supply. Following that, we connected everything securely and wrapped the coil five times around.
Online, Chemistry, ed. "Solar Powering the World." Solar Energy (Photovoltaic Cells). 29 July 2008 .
By doing this experiment, I can know the physical and chemical properties of these samples. After I get my results about the physical and chemical properties of these samples, I can compare my results with the information given by the past student and identify the 5 unknown samples, finding out which sample is which substance. Hypothesis = ==
The primary goal of this experiment was to determine which types of glassware are the most accurate and precise in measuring substances. Another goal of this experiment was to help familiarize ourselves with the different types of glassware, and how we should handle the laboratory equipment. The accuracy and precision of a particular type of glassware is important because it allows for accurate measurements when performing different experiments. It also allows us to differentiate between glassware that is better for containing substances versus glassware that can deliver substances more accurately. In order to measure the accuracy and precision of the different types of glassware, we first chose seven different types of glassware. The general
The air in between the layers of glass should be thick and dense, so that it can save energy. One of the most common airs used in-between glass is argon. When argon is used heat loss is reduced. You could also use carbon dioxide or sulfur hexa-fluoride between glass.
Copper wire, bare, 24-gauge, 9 V battery, 9 V battery clip, and more. I am going test each liquid to see which liquid has more electrolytes, and by knowing that it will help me find out which is better for you. I believe by doing this experiment it will help me see if my hypothesis is right or
borate) and 1.0 g. of sodium hydroxide in 20 mL of warm water. It may