Anode

they can touch if spaced correctly with card. Thickness of copper electrodes This is effective enough to change the entire process. This will also change the surface area, the greater the surface area, the greater the amount of Cu 2+ ions lost at the anode and gained at the cathode. Once chosen they have to stay the same when repeating the experiment. Type of copper electrodes If they are thicker or shorter this will change the rate of electrolysis over time. The larger the electrode, the more copper

catalyst in the electron transfer between the electrodes. A MFC is just like any other fuel cell in its function which can undergo a half cell reaction. A typical microbial fuel cell consists of anode and cathode compartments separated by a cation (positively charged ion) permitting specific membrane. At the anode, the organic matter or substrate is oxidized by microorganisms, generating CO2, electrons and protons. Electrons are transferred to the cathode through an external electric circuit, while protons

the cathode is where reduction occurs and the anode is where oxidation occurs as all areas of electrochemistry depend on cathodes and anodes. The cell potential of a cell is a measure of the difference between the cathode and anode of a reaction and is found by subtracting the cathode minus the anode using the table of standard half reactions . Using cell potentials it is possible to find what a certain unknown material is present in the cathode or anode. If one wishes to calculate the theoretical

Chemistry Assessment Task 2 Identify the metal ore from which copper is extracted. Copper is extracted from chalcopyrite ore, its chemical formula is CuFeS2. Chalcopyrite is a brass-yellow mineral with a chemical composition of CuFeS2. Most sulfide mineral deposits in Australia contain chalcopyrite ore and has been the most valued ore of copper for thousands of years. Describe the mining and extraction process of commercial copper ore deposits Copper can be extracted from the chalcopyrite ore by:

Redox reaction: Redox reactions involve transfer of electrons from one reactant to another Anode: The anode is the electrode which oxidation occurs Cathode: The cathode is the electrode at which reduction occurs Oxidation: Oxidation is loss of electrons Reduction: Reduction is gain of electrons Oxidation state: The oxidation state of an element is the charge on the ion Salt bridge: The salt bridge allows the migration of ions to occur Electrolyte: An electrolyte is a substance which in solution

a cathode and an anode that are separated by an electrolyte. The electrolyte is typically an acid or a salt. When a closed circuit is made between the anode and the cathode, the positive ions move from the anode to the cathode, and the negative ions move from the cathode to the anode. The movement of ions causes a current that can be harnessed (Battery 168). The whole idea of a battery is a chemistry concept, but where chemistry is useful now is finding new materials for the anode, cathode, and electrolyte

acid battery generally contains half a dozen lead-acid cells that are connected in series. Each one of the six cells contains a cathode of lead (IV) oxide and an anode of lead. A sulfuric acid solution that is highly acidic (pH as low as 0) provides the solution for each electrode to be immersed in. The electrode reactions are: Anode: Pb(s) + H2SO4(aq) → PbSO4(aq) + 2H+ (aq) + 2e- Cathode: PbO2(s) + H2SO4(aq) + 2H+ (aq) + 2e- → PbSO4(aq) + 2H2O(l) Each cell has a voltage of about 2v, and

Now, the picture is much more clearer. Although other factors such as temperature, through the Arrhenius formula , impacts the transition of lithium ions form cathode to anode or vice versa, a sufficient qualitative and quantitative analysis have been provided to answer the question of “how a LIB works” from a physical point of view. The analysis of electron migration is as vast and multi-dimensional as the lithium ion migration however, due to the detailed discussion of such migrations in any modern

Introduction- Batteries/Fuel Cells Fuel cells operate via a chemical reaction which generates electricity. All fuel cells contain a positive anode, a negative cathode and an electrolyte to carry the charged particles through the cell. They also contain a catalyst which will increase the rate of the reaction occurring. The electricity produced can then used to power various appliances. This, in turn, creates a circuit with the current continually flowing in and out of the cell until the reaction

can be installed as an integrated component. The CCM which is 3-layer can be used as an attachment for the GDL’s 5-layer configuration for installation. Carbon micro-porous layer is used for this application. When a fuel and oxidant are applied on anode and cathode side of the catalysts the electrochemical reactions is conducted. Membrane electrode assemblies is typically based on manufacturing and quality control. They have developed a useful product which is not matched by others, and which gives