Electrolysis

Electrolysis video resource. Watch the video and answer the following answers Define electrolysis What type of bonding is present in compounds that can be electrolysed? Match the following terms with their explanations Electrolysis Cause chemical changes Electrodes Solid graphite or metal rods conducting electricity Electrolyte Liquid that allow passage of electricity Cathode Negative electrode Anode Positive electrode Given below is a diagramatic representation of electrolysis. Label the parts. Use the following termsNegative ion, Positive ion, Cathode, Anode, Electrolyte positive ion Anode Cathode Electrolyte negative ion Predict the products of the substances after electrolysis. Example - Zinc chloride --> zinc + chlorine Zinc Iodide Zinc + Iodine Lithium bromide Lithium + bromine Iron (III) fluoride Iron + Fluorine Sodium Oxide Sodium + Oxygen Potassium Chloride Potassium + Chlorine Match the ion to the electrode Opposite charges attract. A positive ion will be attracted to the cathode (the negative electrode) and vice versa. Cathode Zn2+ Pb2+ Cu2+ Na+ K+ Anode O2- Cl- Br- I- Choose the correct word to fill in the blanks Zinc chloride is an ionic compound. Ionic compounds do not conduct electricity when they are solid, as their ions are in fixed positions in their giant lattice. However, once an ionic compound is molten or dissolved in water, the ions are free to move around in the liquid and can carry their charge to the electrodes.The positive zinc ions are attracted to the cathode, the zinc ions gain electrons from the negative electrode and become zinc atoms. At the same time the negative chloride ions are attracted to the anode. The chloride ions lose electrons to the positive electrode and become chlorine atoms.