Presentation on theme: "Electrolysis project Electrode: Is an electrical conductor that is used to pass current through an electrolyte."— Presentation transcript:
Electrolysis project Electrode: Is an electrical conductor that is used to pass current through an electrolyte.
Electrolyte Is any substance that has free ions that make a substance electrically conductive. Some electrolytes are molten and others are solids. They are usually an ionic solution They are solutions of acids, bases or salts
Anode and Cathode Anode: Is the positive electrode where the current flows in from the outside Cathode: Is the negative electrode where the current flows out
Products Molten lead (II) bromide (PbBr 2 ) Lead + bromine + hydrogen gas Aqueous copper chloride (CuCl 2 ) Copper + chlorine gas Dilute sulphuric acid (H 2 So 4 ) Hydrogen + oxygen Aqueous copper sulphate (CuSo 4 ) Copper + oxygen
Industrial processes Refining copper by electrolysis: Is used in a factory with copper wires and is very efficient because it can conduct high amounts of electricity. You can only refine copper by electrolysis. The electrolyte consists of CuSo4 and the electrodes are made from Cu 2+. Refining: The process of purification
Electroplating of metals: During this process, the surface that is going to be covered acts as a cathode in an electrolytic cell. The material that covers the material is the anode. Electroplating is used in industry to cover a less expensive metal with a more expensive one. Electroplating: The process of coating a surface of a conducting material with a metal.
Obtaining aluminium from pure aluminium oxide (in molten cryolite): In order to obtain aluminium from pure background aluminium oxide you have to refine bauxite in the Bayer process. Bauxite is background the most important ore of aluminium and the aluminium oxide must be purified before it can be refined to aluminium metal. background
Obtaining products from sodium chloride Chlorine: In order to obtain chlorine from sodium chloride electrolysis is required. When the sodium chloride is put in the test tube the sodium and the chloride separate because the current has been passed. Hydrogen: When the sodium chloride is in the test tube hydrogen gas forms at the cathode Sodium hydroxide: This is the product after sodium chloride has been through the process of electrolysis.